USER GUIDE FOR SIGFOX-READY AMMONIA GAS SENSOR WITH BLE WSSFCB-NH3 THIS IS OBSOLETE MANUAL Please access https://www.iot.daviteq.com/wireless-sensors for updated manual WSSFC- NH3-MN-EN-01 AUG-2021 This document is applied for the following products SKU WSSFCB-NH3 HW Ver. 1.1 FW Ver. 1.0 Item Code WSSFCB-NH3-8-01 Wireless Sigfox Ammonia Gas Sensor with BLE, Internal antenna, Type AA battery 1.5VDC, IP67, RC1 zone WSSFCB-NH3-9-01 Wireless Sigfox Ammonia Gas Sensor with BLE, Internal antenna, Type AA battery 1.5VDC, IP67, RC2-RC4 zones 0. Configuration Check List STEP 1: Select RC 1. Select RC zone RC zones selection 1, 2, 4,... is RCZ1, RCZ2, RCZ4,...  (refer to section 6) STEP 2:  Check ID and PAC Use Modbus Configuration Cable to read the ID and PAC values Refer to register address 8 and 10 (DEC) STEP 3:  Configure the sensor's operating parameters Configure parameters like cycle send data, alarm, a, b,... Refer to the configuration section 5 STEP 4:  Add device to Backend Sigfox refer to section 5.2 for details STEP 5:  Installation refer to section 8  for details 1. Functions Change Log HW Ver. FW Ver. Release Date Functions Change 1.1 1.0 DEC-2020 2. Introduction WSSFC-NH3 is a Sigfox-ready electrochemical-type gas sensor which has high sensitivity to low concentrations of ammonia gas, high selectivity, and a stable baseline. Integrated ambient humidity and temperature so the sensor can be measured by special algorithm expertise through modelling and compensating of external heat sources without the need of any additional components. With Ultra-low power design and smart firmware allow the complete Wireless and Sensor package run on 1 x AA battery 3.6V for 2-5 years with 15 minutes update. It can support all regions of Sigfox network in over the World, RC1, RC2, & RC4. Typical Applications: Monitor leakage of Ammonia gas for Refrigerator, monitor Ammonia in private or public toilets,... 3. Specification SENSORS SPECIFICATION: NH3 sensor electrochemical-type gas sensor Measuring range for NH3 0..100 ppm Max detecting concentration 200 ppm Repeatability / Resolution / Stability per month < 10% of Reading value / 1 ppm / < 2% of Reading value Zero stability +/- 2 ppm Working atmospheric pressure 101.3 Kpa +/- 10% Sensor life > 2 years Humidity and Temperature sensor Digital type, factory calibrated Humidity measuring range / accuracy / resolution 0 .. 100 %RH, ± 2.0% / 0.1% Temperature measuring range / accuracy / resolution -40 .. + 85°C / ± 0.2°C / 0.1°C Working temperature and humidity -30 .. + 50°C, 15 .. 90% RH Sensor housing / Rating SS316/SS304 housing with 316SS sintered filter / for Indoor use Sigfox SPECIFICATION: Sigfox zones select RC1-RC2-RC4 Antenna Internal Antenna 2dbi Battery 02 x AA Type 1.5VDC, working time up to 10 years (depends on configuration) RF Module complies to CE, FCC, ARIB Working temperature -40°C..+60°C (using Energizer Lithium Ultimate AA battery) Housing/Protection Aluminum + Polycarbonate / IP67 Dimension / Net weight H180xW73xD42 / < 400 grams 4. Dimensions 5. Operation Principle Upon power on, the Sigfox node has 60 seconds to wait for off-line configuration (via cable with ModbusRTU protocol) After 1 minute 30 seconds later the device will send the first data packet and at the same time wait for the downlink packet from the Base Station. Then during the operation, there are 03 cases of sending data to base station: 1. When the sensor sampling time interval is reached, the Sigfox node will read the data from Input or sensor and performing the calculation. After that it will check calculated value with alarm thresholds. If the calculated was out off the threshold values (Lo or Hi), called alarm, and the number of times of alarm did not pass the limit of number of alarms, then it will send data to Base station immediately; NOTE: Once sending the data to base station by this alarm event, the timer of sending time interval will be reset; 2. When the sending time interval is reached, it will send data to Base station immediately, regardless of value; 3. By using the magnet key, the Sigfox node can be triggered to send data to base station immediately. There will be a beep sound from the buzzer meaning the data has been sent. REED SWITCH EVENT PRE-CONDITION ACTION LED STATUS BUZZER STATUS ACTIVITIES POST-CONDITION 2 START_UP Any state Move Magnet Key to contact point of REED SWITCH and hold 5s.Buzzer beep 1 long time. Blink WHITE Beep 1 long time See FW specs Device reset 1 FORCE_DATA Any state Move Magnet Key to contact point of REED SWITCH.Buzzer beeps 1 time, move Magnet Key away. Blink SKY BLUE Beep 1 time See FW specs Back to previous state 1 PARAMETERS_UPDATE Any state Move Magnet Key to contact point of REED SWITCH.Buzzer beeps 1 time, hold Magnet Key 5s.Buzzer beeps 2 times. Blink PURPLE Beep 2 times See FW specs Back to previous state NOTE:Once sending the data to base station by the magnet key, the timer of sending time interval will be reset;The shortest time interval between the two manual triggers is 5s. if shorter than 5s, there will be no data sending. 5.1 RC technical details The RF transmit power will be automatically set as the max value as allowed by the Zone. Sigfox Radio Configuration (RC) defines the radio parameters in which the device shall operate: Sigfox operating frequencies, output power, spectrum access mechanism, throughput, coexistence with other radio technologies, etc. Each radio configuration includes 4 uplink classes: 0u, 1u, 2u, and 3u. The Sigfox network globally works within the ranges from 862 to 928 MHz. But not all RCs require such a wide range of operation. RC1 RC2 RC3 RC4 RC5 RC6 RC7 Uplink center frequency (MHz) 868.130 902.200 923.200 920.800 923.300 865.200 868.800 Downlink center frequency (MHz) 869.525 905.200 922.200 922.300 922.300 866.300 869.100 Uplink data rate (bit/s) 100 600 100 600 100 100 100 Downlink data rate (bit/s) 600 600 600 600 600 600 600 Sigfox recommended EIRP (dBm) 16 24 16 24 14 16 16 Specifics Duty cycle 1% * Frequency hopping ** Listen Before Talk *** Frequency hopping ** Listen Before Talk *** Duty cycle 1% * * Duty cycle is 1% of the time per hour (36 seconds). For an 8 to 12 bytes payload, this means 6 messages per hour, 140 per day. ** Frequency hopping: The device broadcasts each message 3 times on 3 different frequencies. Maximum On time 400 ms per channel. No new emission before 20 s. *** Listen Before Talk: Devices must verify that the Sigfox-operated 200 kHz channel is free of any signal stronger than −80 dBm before transmitting. Sigfox’s high limit EIRP recommendation is included in each column although regulations sometimes allow for more radiated power than the Sigfox recommendation. Sigfox’s recommendation is set to comply with the Sigfox technological approach of: Low current consumption Balanced link budget between uplink and downlink communication 5.2 Add a device to the Backend Sigfox Step 1: Log in to the sigfox backend website Step 2: Click on Device Step 3: Click New → Select a group Step 4: Fill in the required information Note: Some of our products may not have end product certification in time, to add the product to Backend Sigfox please follow the steps below. Click on the text as shown below Check the box as shown below to register as a prototype 5.3 Device behavior & Firmware Specification of NH3 Sensor Please read sections 5.5 to 5.8 carefully for a better understanding of the configuration 5.3.1 Start-up features 5.3.1.1 Payload fields EVENT_TYPE 5.3.1.2 Description START_UP event is prepared every time the device is starting up. It can be either if the device is starting for the first time, or when the device is being reset. The device can be reset by two possible ways, one is thanks to the reed power switch , the other thanks to the DEVICE_RESET flag set in a downlink message. 5.3.1.3 Frame 5.3.1.4 Flowchart Nominal flow: Flow when coming from downlink: 5.3.2 Heartbeat feature 5.3.2.1 Parameters HEARTBEAT_PERIOD 5.3.2.2 Payload fields EVENT_TYPE HW_VERSION FW_VERSION LATEST_SIGFOX_DOWNLINK 5.3.2.3 Description HEARTBEAT event is prepared every HEARTBEAT_PERIOD. When the uplink message of the HEARTBEAT event is prepared, the latest valid configuration that the device has received is provided through the LATEST_SIGFOX_DOWNLINK field. The HEARTBEAT event is a Sigfox downlink exchange. Thanks to the downlink message, pre-defined parameters of the device can be modified in order to change the device behavior. 5.3.2.4 Frame 5.3.2.5 Flowchart 5.3.3 Parameters update feature 5.3.3.1 Payload fields EVENT_TYPE LATEST_SIGFOX_DOWNLINK 5.3.3.2 Description When the appropriate action is done by the user on the Reed Switch 2, a PARAMETERS_UPDATE event is generated. When the uplink message of the PARAMETERS_UPDATE event is prepared, the latest valid configuration that the device has received is provided through the LATEST_SIGFOX_DOWNLINK field. The PARAMETERS_UPDATE event is a Sigfox downlink exchange. Thanks to the downlink message, pre-defined parameters of the device can be modified in order to change the device behavior. 5.3.3.3 Frame 5.3.3.4 Flowchart 5.3.4 NH3 feature 5.3.4.1 Parameters (DLK) For NH3 measurement NH3_ENABLE NH3_MEASURE_PERIOD For NH3 message feature NH3_EVENT_ENABLE NH3_EVENT_PERIOD For ALERT feature NH3_ALERT_ENABLE NH3_ALERT1_MAX_THRESHOLD NH3_ALERT2_MAX_THRESHOLD For BLE advertizing ALERT_FLAG_reset BLE_BROADCAST_ENABLE BROADCAST_PERIOD_normal (TBC) BROADCAST_PERIOD_alert(TBC) BLE_RF_OUTPUT_POWER 5.3.4.2 Payload fields EVENT_ID … 5.3.4.3 Description NH3 SENSING and EVENT The NH3 sensing is enabled thanks to the NH3_ENABLE flag. The NH3 event is enabled thanks to the NH3_EVENT_ENABLE flag. New NH3 values are taken every NH3_MEASURE_PERIOD. NH3 event is prepared every NH3_EVENT_PERIOD. Before sending the event, all statistics (minimum, average and maximum for NH3 levels) are computed since the last NH3 event. NH3 ALERT The NH3 alert feature is enabled thanks to the NH3_ALERT_ENABLE flag. The NH3 sensing check against NH3_ALERT1_MAX_THRESHOLD and NH3_ALERT2_MAX_THRESHOLD, is done anytime a NH3 measurement is performed. If the check reports that the measured level is above NH3_ALERT1_MAX_THRESHOLD or NH3_ALERT2_MAX_THRESHOLD, an ALERT procedure will start. The NH3 measured value will be recorded during the alert as well as the alert duration. The ALERT message will be sent right after the alert is detected with a DLK request. When alert message is received at Sigfox server, this will initiate to send an available downlink (DLK) at Sigfox server to device. The message will be sent again until a DLK is received every 10 minutes and until the level goes back to a normal level.After a DLK is received, the device will keep sending Alert message every 10 minutes until the alert is over. During the ALERT procedure, all other Sigfox events are cancelled. Only NH3 measurements is performed and BLE advertising are maintained. BLE advertising When the BLE_BROADCAST_ENABLE flag is set to true, the device will broadcast a BLE beacon signal. The signal broadcasted will change according to the following rules: The BLE NORMAL frame is broadcasted every BROADCAST_PERIOD_normal when the alert_type flag is set to 0. The BLE ALERT 1 frame is broadcasted every BROADCAST_PERIOD_alert when the alert_type flag is set to 1. The BLE ALERT 2 frame is broadcasted every BROADCAST_PERIOD_alert when the alert_type flag is set to 2. 5.3.4.4 Frames 5.3.4.5 Flowchart Sigfox Normal mode Sigfox Alert mode If the message counter reaches a value above the maximum possible tentative field value (255) in the NH3_ALERT message, the tentative value should be kept at the maximum (255). BLE broadcast BLE broadcast format 5.4 Light and sound indicator The light indicator is always in RF listening mode and searching for a beacon signal from the sensor it is attached to. The indicator device will be able to identify the beacon signal transmitted by the NH3 sensor it is attached to and only consider the beacon signal from that specific sensor. Some simple synchronization mechanisms will be implemented in order to minimize the power consumption of the receiver to an acceptable level. Depending on the beacon received, the indicator device will have the behavior described in the following flowcharts: No Signal: Signal received « OK »: Signal received « ALERT 1 »: Signal received « ALERT 2 »: 5.5 Pairing with BLE Indicator Insert the batteries into Sigfox NH3-BLE device, wait 1 minute for configuration stage end, then Sigfox NH3-BLE will broadcast BLE data. Then insert the batteries into BLE Indicator, place it near to Sigfox NH3BLE When BLE Indicator has got ID NOT MATCH with ID from Sigfox NH3-BLE, BLE Indicator will beep 2 times. So you need to clear that ID before pairing the BLE Indicator with the new Sigfox device. To clear the ID in BLE Indicator, place magnet key to reed switch area (marked as a magnet on the nameplate), the BLE indicator will beep 1 time, and the status led (the led on side of the board) blink WHITE. It is recommended that when adding an ID to a BLE Indicator you should clear the ID first. After clearing the ID of the BLE Indicator, you may wait for up to 1 minute for it to pair with the new Sigfox device. When pairing is successful, you can hear 1 beep sound; When BLE Indicator have ID MATCH with ID from Sigfox NH3BLE , BLE Indicator will operation normal (details in Firmware Specifications Sound and light indicator) 5.6 Event ID Event Typebits EVENT_ID4 COLOR START_UP 0 WHITE HEARTBEAT 1 GREEN PARAMETERS_UPDATE 2 PURPLE NH3_FORCE_DATA 3 SKY BLUE NH3 4 SKY BLUE NH3_ALERT 5 RED Not used 6 Not used 7 Not used 8 Not used 9 Not used 10 Not used 11 Not used 12 Not used 13 Not used 14 Not used 15 5.7 Configuration Parameters Should not change the value in the Blue cells Category Parameter Description Possible values Default value Length (in bits) DEVICE LED_BUZZER_ENABLE Flag to enable/disable LED and Buzzer interactions for action not triggered by the button. 0b0 = false, LEDs are OFF0b1 = true, LEDs are ON 0b0 = false 1 DEVICE DEVICE_RESET Once this parameter is set, the device shall restart once after having received the DL. 0b1010 = 0xA = Force device resetothers = do nothing others = do nothing 4 DEVICE TX_REPEAT Number of Sigfox frames 0b0 =  1 frames0b1 = 3 frames 0b0 = 1 frames 1 HEARTBEAT HEARTBEAT_PERIOD Period of time to send HEARTBEAT event 0b000 = every  1h0b001 = every  6h0b010 = every 12h0b011 = every 24h (1 day)0b100 = every 48h (2 day)0b101 = every 72h (3 day)0b110 = every 120h (5 day)0b111 = every 240h (10 day) 0b100= every 48h (2 days) 3 NH3 NH3_ENABLE Enable NH3 sensing 0b0 = false, NH3 sensing is disabled0b1 = true, NH3 sensing is enabled 0b1 = true 1 NH3 NH3_MEASURE_PERIOD Interval of time between two consecutive NH3 values are acquired 0b0000 = every 1s0b0001 = every 2s0b0010 = every 5s0b0011 = every 10s0b0100 = every 20s0b0101 = every 30s0b0110 = every 1min0b0111 = every 2min0b1000 = every 5min0b1001 = every  10min0b1010 = every 20min0b1011 = every 30min0b1100 = every 1h0b1101 = every 2h0b1110 = every 3h0b1111 = every 6h 0b0010 = every 5s 4 NH3 NH3_EVENT_ENABLE Enable NH3 event 0b0 = false, NH3 event is disabled0b1 = true, NH3 event is enabled 0b1 = true 1 NH3 NH3_EVENT_PERIOD Interval of time between two consecutive NH3 events 0b000 = every  10min0b001 = every  30min0b010 = every 1h0b011 = every 2h0b100 = every 3h0b101 = every 6h0b110 = every 12h0b111 = every 24h 0b010 = every 1h 3 NH3 NH3_ALERT ENABLE Enable NH3_ALERT event 0b0 = false, NH3 ALERT feature is disabled0b1 = true, NH3 ALERT feature is enabled 0b0 = false, NH3 ALERT feature is disabled 1 NH3 NH3_ALERT1_MAX_THRESHOLD Threshold #1 on the temperature to trig a NH3_ALERT event 8-bit unsigned integerFormula: (8-bit_NH3ppm*2)= real_NH3_level_in_ppmRange: 0 to 100ppmAccuracy: 0.5ppmExample: 0b01110100 = 0x74 = 116 => (116 / 2) = 58ppm 0b00001010 = 5ppm 8 NH3 NH3_ALERT2_MAX_THRESHOLD Threshold #2on the temperature to trig a NH3_ALERT event 8-bit unsigned integerFormula: (8-bit_NH3ppm*2)= real_NH3_level_in_ppmRange: 0 to 100ppmAccuracy: 0.5ppmExample: 0b01110100 = 0x74 = 116 => (116 / 2) = 58ppm 0b00010100 = 10ppm 8 NH3 ALERT_FLAG_reset Flag to reset the BLE broadcast mechanism and set it back to normal. 0b1010 = 0xA = leave BLE alert modeothers = do nothing others = do nothing 1 BLE BLE_BROADCAST_ENABLE Enable BLE advertising functionality 0b0 = false, BLE advertising feature is disabled0b1 = true, BLE advertising feature is enabled 0b1 = true, BLE advertising feature is enabled 1 BLE BROADCAST_PERIOD_normal Broacasting period when the device is in normal mode 0b000 = every 1s0b001 = every 2s0b010 = every 5s0b011 = every 10s0b100 = every 30s0b101 = every 1 min0b110 = every 2 min0b111 = every 5 min 0b011 = every 10s 3 BLE BROADCAST_PERIOD_alert Broacasting period when the device is in alert mode 0b000 = every 1s0b001 = every 2s0b010 = every 5s0b011 = every 10s0b100 = every 30s0b101 = every 1 min0b110 = every 2 min0b111 = every 5 min 0b001 = every  2s 3 BLE BLE_RF_OUTPUT_POWER Transmit power level 0b000 =  -20dBm0b001 = -10dBm0b010 =  0dBm0b011 =  5dBm 0b000 =  -20dBm 3 5.8 Payload Data The following is the format of payload data that will be sent to the Sigfox server. 5.8.1 Payload Fields Category Data name Description Encoding or Possible values Length (in bits) DEVICE EVENT_ID Unique ID identifying the device event 4-bit unsigned integerPossible values: As defined in Event ID tab 4 DEVICE LATEST_SIGFOX_DOWNLINK The Latest received and valid Sigfox downlink frame 64-bit encoded fieldSee Sigfox Downlink tab 64 DEVICE HW_VERSION Indicate HW  version 4-bit unsigned integerHW_VERSION = HW_VERSION value in EEPROM set in productionif Value unknown, default value will be 0 4 DEVICE FW_VERSION indicate FW version 8-bit unsigned integerRefer to FW release note 8 NH3 NH3 NH3 level of the surrounding environment of the device 16-bit unsigned integerFormula: (16-bit_NH3ppm/100)= real_NH3_level_in_ppmRange: 0 to 100ppmAccuracy: 0.01ppmExample: 0x16B7 = 5815 => (5815 / 100) = 58.15ppm 16 Type ALERT_TYPE Type of alert 2-bit unsigned integer0b0 = Not used0b1 = Alert type 10b10 = Alert type 20b11 = Not used 2 TIME ALERT_DURATION Alert duration in hours 8-bit unsigned integerFormula: 8-bit_Alert_duration =  real_TempAlert_duration_in_hoursRange: 0 to 255 hoursAccuracy: 1 hourExample: 0b00100000 = 0x20 = 32 =>  32 hours 8 Tentative TENTATIVE Tentative number 8-bit unsigned integerFormula: (8-bit_Tentativve +1)= real_tentative #Range: 1 to 256Accuracy: 1Example: 0b00000111 = 0x7=7=> 7+1 =>tentative # 8 8 5.8.2 Sigfox Uplink Frame Format For more details, you can download the file HERE Size Event Type EVENT_ID HW_VERSION FW_VERSION CURRENT CONFIGURATION 10.0 bits 4 4 8 64 Payload data format EVENT_ID HW_VERSION FW_VERSION LATEST_SIGFOX_DOWNLINK START_UP yes yes yes yes Event Type EVENT_ID HW_VERSION FW_VERSION CURRENT CONFIGURATION 10.0 bits 4 4 8 64 Payload data format EVENT_ID HW_VERSION FW_VERSION LATEST_SIGFOX_DOWNLINK HEARTBEAT yes yes yes yes Event Type EVENT_ID HW_VERSION FW_VERSION CURRENT CONFIGURATION 10.0 bits 4 4 8 64 Payload data format EVENT_ID HW_VERSION FW_VERSION LATEST_SIGFOX_DOWNLINK PARAMETERS_UPDATE yes yes yes yes Event Type EVENT_ID HW_NH3_ERROR RESERVED NH3 3.0 bits 4 1 3 16 Payload data format EVENT_ID HW_NH3_ERROR - NH3 NH3_FORCE_DATA yes yes zeros yes Event Type EVENT_ID HW_NH3_ERROR RESERVED NH3 MIN_NH3 AVG_NH3 MAX_NH3 9.0 bits 4 1 3 16 16 16 16 Payload data format EVENT_ID HW_NH3_ERROR - NH3 NH3 NH3 NH3 NH3 yes yes zeros yes yes yes yes Event Type EVENT_ID HW_NH3_ERROR RESERVED ALERT_TYPE EXTREME_NH3 ALERT_DURATION TENTATIVE 5.0 bits 4 1 1 2 16 8 8 Payload data format EVENT_ID HW_NH3_ERROR - ALERT_TYPE NH3 ALERT_DURATION TENTATIVE NH3_ALERT yes yes zeros yes yes yes yes 5.8.3 Sigfox Downlink Frame Format. The Sigfox node is only able to receive max 04 downlinks a day, each downlink will be waiting in every 06 hours. User can set the down link data in Sigfox back-end system in advance, whenever the Sigfox node connected to base stations and with downlink waiting is enable at that time (one time in 6 hours), the downlink data will be loaded to Sigfox node. The downlink data can be any configuration parameter. Please pay attention when send downlink data. If there was a mistake in sending wrong data, it would cause the Sigfox node not working properly and user need to configure it by offline cable!!! For more details, you can download the file HERE Downlink Frame Format: Downlink type= 0b0000 Downlink type= 0b0101 5.9 BLE Broadcast Format Size Broadcast Type EDDYSTONE HEADER DEVICE_ID ALERT_TYPE ALERT_ FLAG_ reset HW_ NH3_ ERROR HW_ VERSION FW_ VERSION CURRENT CONFIGURATION NH3 28.0 bits 96 32 2 1 1 4 8 64 16 Payload data format EDDYSTONE HEADER DEVICE_ID ALERT_TYPE ALERT_ FLAG_ reset HW_ NH3_ ERROR HW_ VERSION FW_ VERSION LATEST_ SIGFOX_ DOWNLINK NH3 BLE Broadcast: OK ALERT_TYPE = 0 0x0201040303AAFEXX16AAFE20 yes yes yes yes yes yes yes yes Size Broadcast Type EDDYSTONE HEADER DEVICE_ID ALERT_TYPE ALERT_ FLAG_ reset HW_ NH3_ ERROR HW_ VERSION FW_ VERSION CURRENT CONFIGURATION NH3 28.0 bits 96 32 2 1 1 4 8 64 16 Payload data format EDDYSTONE HEADER DEVICE_ID ALERT_TYPE ALERT_ FLAG_ reset HW_ NH3_ ERROR HW_ VERSION FW_ VERSION LATEST_ SIGFOX_ DOWNLINK NH3 BLE Broadcast: OKALERT_TYPE = 1 or 2ALERT_FLAG_reset = 1 0x0201040303AAFEXX16AAFE20 yes yes yes yes yes yes yes yes Size Broadcast Type EDDYSTONE HEADER DEVICE_ID ALERT_TYPE ALERT_ FLAG_ reset HW_ NH3_ ERROR HW_ VERSION FW_ VERSION CURRENT CONFIGURATION NH3 28.0 bits 96 32 2 1 1 4 8 64 16 Payload data format EDDYSTONE HEADER DEVICE_ID ALERT_TYPE ALERT_ FLAG_ reset HW_ NH3_ ERROR HW_ VERSION FW_ VERSION LATEST_ SIGFOX_ DOWNLINK NH3 BLE Broadcast: ALERT 1ALERT_TYPE = 1ALERT_FLAG_reset = 0 0x0201040303AAFEXX16AAFE20 yes yes yes yes yes yes yes yes Size Broadcast Type EDDYSTONE HEADER DEVICE_ID ALERT_TYPE ALERT_ FLAG_ reset HW_ NH3_ ERROR HW_ VERSION FW_ VERSION CURRENT CONFIGURATION NH3 28.0 bits 96 32 2 1 1 4 8 64 16 Payload data format EDDYSTONE HEADER DEVICE_ID ALERT_TYPE ALERT_ FLAG_ reset HW_ NH3_ ERROR HW_VERSION FW_VERSION LATEST_ SIGFOX_ DOWNLINK NH3 BLE Broadcast: ALERT 2ALERT_TYPE = 2ALERT_FLAG_reset = 0 0x0201040303AAFEXX16AAFE20 yes yes yes yes yes yes yes yes 6. Modbus Memmap 6.1 Data table Modbus Register (Decimal) Modbus Register (Hex) Function Code # of Registers Description Range Default Format Property Comment 2 2 3 4 firmware version string Read 6 6 3 2 hardware version string Read 8 8 3 2 device ID hex Read Product ID 10 A 3 4 device PAC hex Read Product PAC 14 E 3 1 SENSOR_TYPE 1-255 uint16 Read Sensor or Input Type 6.2 Configuration table Modbus Register (Decimal) Modbus Register (Hex) Function Code (Read) Function Code (Write) # of Registers Description Range Default Format Property Comment 270 10E 3 16 4 CURRENT_CONFIGURATION hex Read/Write 274 112 3 16 1 SERVER_CONFIG uint16 Read / Write 0: Send to Sigfox Network1: Send to Dongle 276 114 3 16 1 RADIO_CONFIG 1, 2, 4 4 uint16 Read / Write RC zones selection 1, 2 ,4 is RCZ1, RCZ2, RCZ4 277 115 3 16 1 TX_POWER 20 int16 Read / Write RF Tx power 278 116 3 16 2 CONSTANT_A 1 float Read / Write Constant a for scaling measured value 280 118 3 16 2 CONSTANT_B 0 float Read / Write Constant b for scaling measured value 282 11A 3 16 2 HIGH_CUT 1E+09 float Read / Write High cut value for calculated value 284 11C 3 16 2 LOW_CUT -1E+09 float Read / Write Low cut value for calculated value 286 11E 3 16 2 SENSOR_BOOT_TIME 200 uint32 Read / Write Boot time of sensor/input, in ms 306 132 3 16 2 SYSTEM_SENSITIVITY 11 float Read / Write The sensitivity of the circuit (mV/ppm) 7. Offline configuration Using the configuration cable to connect to the sensor as below picture. Serial port configuration on computer: 9600 baud, None parity, 1 stop bit.Reading data by Function 3.Writing data by Function 16. During connection with Modbus configuration tool, the Sigfox node will send all data in realtime: Battery, Battery level, Vref, Button status, reed switch status, PCB temperature, Measured value, alarm status. Step to configure & check data: NOTE: The Modbus configuration can be done in the first 60s after power up the Sigfox node. After 60s, if user can not finish the configuration, user need to reset the power of Sigfox node again, by removing battery in at least 15s. Step 1: Install the Modbus Configurator Software in the link below https://filerun.daviteq.com/wl/?id=yDOjE5d6kqFlGNVVlMdFg19Aad6aw0Hs How to use the Modbus configuration software Step 2: Plug the configuration cable to Computer via USB port; Step 3: Open the housing; Step 4: Plug the connector to the configuration port; Step 5:  Import the configuration file by importing the csv file: Go to MENU: FILE / Import New / => select the file with name NH3 Sensor-2021.10.30-Template-V1.2.csv (in the link below). Then click Connect; CONFIGURATION TEMPLATE FILE FOR SIGFOX WSSFC-NH3 8. Installation 8.1 Locate the good place for Radio signal To maximize the distance of transmission, the ideal condition is Line-of-sight (LOS) between the Sigfox sensor and Base station. In real life, there may be no LOS condition. However, the Sigfox sensor still communicate with Base station, but the distance will be reduced significantly. ATTENTION:DO NOT install the Sigfox sensor or its antenna inside a completed metallic box or housing, because RF signal can not pass through metallic wall. The housing is made from Non-metallic materials like plastic, glass, wood, leather, concrete, cement…is acceptable. 8.2 Mounting Installation method: Mount to the wall The mounting bracket is made from hard metallic material 8.3 Battery installation Steps for battery installation: Step 1: Using M4 Hex key to open the cover Step 2: Open the housing, then insert 02 x AA 1.5VDC battery, please take note the poles of the battery ATTENTION:REVERSED POLARITY OF BATTERIES IN 10 SECONDS CAN DAMAGE THE SENSOR CIRCUIT!!! Step 3: Insert the top plastic housing (Please note the 2 reed joint) 9. Troubleshooting No. Phenomena Reason Solutions 1 Node does not send RF to base station periodically, LED does not blink No power supply or battery ran out Configuration sending cycle is incorrect Check that the battery is empty or not installed correctly Check the power supply Check the send cycle configuration 2 Node does not send RF to base station according to the alarm, LED does not blink The alarm configuration is incorrect Running out of the number of alarms set for the day Check alarm configuration Check the configuration for the maximum number of alarms per day 3 Node does not send RF to base station when activated by the magnetic switch, LED does not blink Magnetic switch has malfunctioned Or place the Magnet key not right position Locate the correct position for magnet key Read the status of the magnetic switch via modbus (when powering or attaching the battery) to see if the magnetic switch is working. 4 Node has blinked LED when sending RF but the base station cannot received Out of the number of RF packages of uplink per day (140 packages / day) Check on the base station whether the event message exceeds the number of RF packets 5 Node has sent RF but the LED does not blink LED malfunction Contact manufacturer 6 The measurement values from sensor do not change, keep constant values for long time Sensor got failure Sensor cable broken Sensor connector is not connected firmly Check sensor cable and connector If the issue is still exist, please contact manufacturer for warranty or replace new sensor 7 The node does not send RF and the RF module is hot Insert the battery in the wrong direction Electronics got problem Check battery polarity 8 RSSI is weak and often loses data Distance between Node and Base station is far or there are many obstructions Connection to Antenna problem Check the location of Sigfox node and distance to the base station Check the antenna connector in the PCB 10. Sensor calibration The output value of NH3 is calculated from the formula: Y= AX + B Where: X = measured value of NH3 from sensor and electronics circuit Y = output value of NH3 which is sent by the Uplink A: Constant_A at address 278 in Memmap of sensor B: Constant_B at address 280 in Memmap of sensor The default values are: A = 1 and B = 0 ==> Y = X After a period of time of working the sensor output will be drifted about < 1% of the reading value per month. So depending on what accuracy you require, you can define how long the sensor needs to be re-calibrated again. For general application, the cycle of calibration would be 3 or 6 months. For the highest accuracy, the cycle would be 1 or 2 months. To re-calibrate the sensor, you need to re-calculation the new values of A and B. How can it be done? By applying the standard Zero and Span Gas. Please follow these steps: 10.1 Apply zeroing gas standard: Before applying zeroing process, please do this step first: place the sensor in a Pure air environment from 20-25 oC in at least 1h. The sensor must be powered and running at the time. Zeroing can be done in 1 of 2 ways as below: - Pure air can be used as a Zero standard for NH3 calibration. Simply place the sensor in a clean environment with pure air. The ambient temperature should be from 20 to 25 oC. - Or using high purity Nitrogen gas (99.999%) as a zero standard gas. Attach the calibration cap into the sensor and turn on the Valve to provide the N2 flow into the sensor. Waiting for the zero gas to enter completely into the sensor for at least 15 minutes, then using the magnet key to activate the SW1. This action will force the sensor to send the new measured data to the Sigfox backend, you got the measured value Y_o. 10.2 Apply span gas standard: As the sensor has the maximum measurement range is 100ppm, you can use any standard NH3 gas cylinder with a concentration from 25ppm to 100ppm for calibration. Please follow the steps below: - Attach the calibration cap into the sensor and turn on the Valve of the cylinder to provide the span gas flow into the sensor. Waiting for the span gas to enter completely into the sensor for at least 5 minutes, then using the magnet key to activate the SW1. This action will force the sensor to send the new measured data to the Sigfox backend, you got the measured value Y_s. 10.3 Calculate the new value A and B From the existing A and B values and the measured value Y_o and Y_s and the 0ppm (zero standards) and 25ppm (for example using 25ppm NH3 standard gas), you can calculate the new value of A and B as below formula. Ex: We have values Two calibration points Standard value The value read from Sigfox device 1 50 70 2 1000 1100 The old A configuration 1 The old B configuration 0 We have: A = (1000-50) / (1100-70) = 0.92233 From the formula: Y = AX + B. Then B = Y - AX = 1000 - 0.92233 x 1100 = -14.56311 The new A configuration 0.92233 The new B configuration -14.56311 10.4 Set the new value A and B by Downlink As the A and B values are separated values in the memmap of the sensor, we need to use 02 downlink messages to send to the sensor. Each message will send 1 value of A or B. For example: A = 1.1 and B = 0.2. Here are the downlink message for setting A & B Parameter PRM_ADDRESS PRM_LENGTH PRM_VALUE DOWNLINK_TYPE Full Downlink (bytes) 1 1 4 2 8 CONSTANT_A 0x16 0x04 = 4 0x3F8CCCCD = 1.1 0x0005 16043F8CCCCD0005 CONSTANT_B 0x18 0x04 = 4 0x3E4CCCCD = 0.2 0x0005 18043E4CCCCD0005 HIGH_CUT 0x1A 0x04 = 4 0x447A0000 = 1000 0x0005 1A04447A00000005 LOW_CUT 0x1C 0x04 = 4 0x00000000 = 0 0x0005 1C04000000000005 SENSOR_BOOT_TIME 0x1E 0x04 = 4 0x000000C8 = 200 0x0005 1E04000000C80005 SYSTEM_SENSITIVITY 0x32 0x04 = 4 0x41300000 = 11 0x0005 3204413000000005 11. Sensor module replacement: 11.1 Remove old sensor module: - Carefully remove the filter; - Remove the exiting sensor module by using your finger to grip and pull it out; 11.2 Install new sensor module: - Unbox the new sensor in the box; - Carefully remove the spring between the 02 pins of the sensor, as below picture; - Plug the sensor module into the device. Make sure the 03 pins of the sensor are completely inserted inside the sockets. Please see the below picture. - Place the filter again and tighten it. 12. Support contacts Manufacturer Daviteq Technologies IncNo.11 Street 2G, Nam Hung Vuong Res., An Lac Ward, Binh Tan Dist., Ho Chi Minh City, Vietnam.Tel: +84-28-6268.2523/4 (ext.122) Email: info@daviteq.com | www.daviteq.com