Environment_Monitoring

Environment Monitoring over LoRaWAN®

This solution shows how to create an environmental data sensor node. The sensor node measures air temperature, air humidity, barometric pressure and gas levels. After the node joins to server successfully, It then transmits this data periodically to a LoRaWan® server.

Data Format

Byte1	Byte2	Byte3	Byte4	Byte5
1	Temperature1	Temperature2	Humidity1	Humidity2

Byte6	Byte7	Byte8	Byte9	Byte10	Byte11	Byte12	Byte13
Barometric1	Barometric2	Barometric3	Barometric4	Gas1	Gas2	Gas3	Gas4

• Byte 1 is a marker for the data type, here always 1
• Every value is MSB first
• Temperature is sent as two bytes, enlarged 100 times for accuracy. For example, 2510 means 25.01 C, sent as 0x09 0xCE
• Humidity is sent as two bytes, enlarged 100 times for accuracy. For example, 4173 means 41.73 %, sent as 0x10 0x4D
• Barometric pressure is sent as four bytes, enlarged 100 times for accuracy. For example, 100945 means 1009.45 hPa, sent as 0x00 0x01 0x8A 0x51
• Gas resistance is sent as as four bytes, For example, 63560 Ohm, sent as 0x00 0x00 0xF8 0x48

Attention

If this examples is implemented for the Region US915, DR0 cannot be used because the package size is too large to fit into the allowed payload.

Hardware required

To build this system, the following hardware are required:

• WisBlock Base RAK5005-O * 1pcs
• WisBlock Core RAK4631 * 1pcs
• WisBlock Sensor RAK1906 * 1pcs

Software required

• Arduino IDE
• RAK4630 BSP
• ClosedCube BME680 library

• SX126x-Arduino library

The code for the environment sensor node can be found in the sketch file

Result

10:30:07.777 -> =====================================
10:30:07.777 -> Welcome to RAK4630 LoRaWan!!!
10:30:07.777 -> Type: OTAA
10:30:07.777 -> Region: EU868
10:30:07.777 -> =====================================
10:30:07.777 -> Chip ID=0x61
10:30:12.974 -> OTAA Mode, Network Joined!
10:30:33.999 -> Sending frame now...
10:30:33.999 -> result: Tem:28.70C Hum:67.00% Pres:948.50KPa Gas:27646Ohms
10:30:33.999 -> lmh_send ok count 1
10:30:53.979 -> Sending frame now...
10:30:53.979 -> result: Tem:28.70C Hum:67.00% Pres:948.50KPa Gas:242488Ohms
10:30:54.012 -> lmh_send ok count 2
10:31:14.006 -> Sending frame now...
10:31:14.006 -> result: Tem:28.70C Hum:67.00% Pres:948.50KPa Gas:457174Ohms
10:31:14.006 -> lmh_send ok count 3
10:31:33.997 -> Sending frame now...
10:31:33.997 -> result: Tem:28.69C Hum:67.00% Pres:948.50KPa Gas:74102Ohms
10:31:34.032 -> lmh_send ok count 4

Data arrives at LoRaWAN® server.

LoRa® is a registered trademark or service mark of Semtech Corporation or its affiliates. LoRaWAN® is a licensed mark.