|
1 |
| -# Arduino Pro Mini TTN LoRaWAN sensor node |
2 |
| - |
3 |
| -<img src="img/case_open.jpg"> |
4 |
| - |
5 |
| -`Arduino Pro Mini` TTN LoRaWAN Node with `DHT22` and `RFM95` module powered by an 18650 protected battery. |
6 |
| -The Arduino was converted to [LowPower](https://jackgruber.github.io/2019-12-27-Low-power-Arduino-Pro-Mini/) by desoldering the power LED and the voltage converter. |
7 |
| - |
8 |
| -## Circuit |
9 |
| - |
10 |
| -<img src="img/circuit.jpg"> |
11 |
| -<img src="gerber/promini_rfm95.jpg"> |
12 |
| - |
13 |
| -## Case |
14 |
| - |
15 |
| -<img src="img/case_3d.jpg"> |
16 |
| - |
17 |
| -## Diagrams |
18 |
| -<img src="img/value_plot.jpg"> |
19 |
| - |
20 |
| -### Battery voltage curve over 12 months with measure and send data all 5 minutes |
21 |
| - |
22 |
| -<img src="img/vcc_plot.jpg"> |
23 |
| - |
24 |
| -## TTN payload decoder |
25 |
| - |
26 |
| -```javascript |
27 |
| -function Decoder(bytes, port) { |
28 |
| - var decoded = {}; |
29 |
| - |
30 |
| - decoded.vcc = (bytes[0] + 200)/100; |
31 |
| - |
32 |
| - if(bytes[1] != 255){ |
33 |
| - decoded.humidity = bytes[1]; |
34 |
| - decoded.humidity &= ~(1 << 7); |
35 |
| - if(bytes[1] >> 7 == 1) { decoded.humidity +=0.5 } |
36 |
| - } |
37 |
| - |
38 |
| - if(bytes[2] != 255 || bytes[3] != 255) decoded.temperature = ((bytes[2]<<24>>16 | bytes[3]) / 10); |
39 |
| - return decoded; |
40 |
| -} |
41 |
| -``` |
42 |
| - |
| 1 | +# Arduino Pro Mini TTN LoRaWAN sensor node |
| 2 | + |
| 3 | +<img src="img/case_open.jpg"> |
| 4 | + |
| 5 | +`Arduino Pro Mini` TTN LoRaWAN Node with `DHT22` and `RFM95` module powered by an 18650 protected battery. |
| 6 | +The Arduino was converted to [LowPower](https://jackgruber.github.io/2019-12-27-Low-power-Arduino-Pro-Mini/) by desoldering the power LED and the voltage converter. |
| 7 | + |
| 8 | +## Circuit |
| 9 | + |
| 10 | +<img src="img/circuit.jpg"> |
| 11 | +<img src="gerber/promini_rfm95.jpg"> |
| 12 | + |
| 13 | +## Case |
| 14 | + |
| 15 | +<img src="img/case_3d.jpg"> |
| 16 | + |
| 17 | +## Diagrams |
| 18 | +<img src="img/value_plot.jpg"> |
| 19 | + |
| 20 | +### Battery voltage curve over 12 months with measure and send data all 5 minutes |
| 21 | + |
| 22 | +<img src="img/vcc_plot.jpg"> |
| 23 | + |
| 24 | +## TTN payload decoder (v2) |
| 25 | + |
| 26 | +```javascript |
| 27 | +function Decoder(bytes, port) { |
| 28 | + var decoded = {}; |
| 29 | + |
| 30 | + decoded.vcc = (bytes[0] + 200)/100; |
| 31 | + |
| 32 | + if(bytes[1] != 255){ |
| 33 | + decoded.humidity = bytes[1]; |
| 34 | + decoded.humidity &= ~(1 << 7); |
| 35 | + if(bytes[1] >> 7 == 1) { decoded.humidity +=0.5 } |
| 36 | + } |
| 37 | + |
| 38 | + if(bytes[2] != 255 || bytes[3] != 255) decoded.temperature = ((bytes[2]<<24>>16 | bytes[3]) / 10); |
| 39 | + return decoded; |
| 40 | +} |
| 41 | +``` |
| 42 | + |
| 43 | +## TTN payload decoder (v3) |
| 44 | + |
| 45 | +```javascript |
| 46 | +function decodeUplink(input) { |
| 47 | + var decoded = {}; |
| 48 | + decoded.vcc = (input.bytes[0] + 200)/100; |
| 49 | + if(input.bytes[1] != 255){ |
| 50 | + decoded.humidity = input.bytes[1]; |
| 51 | + decoded.humidity &= ~(1 << 7); |
| 52 | + if(input.bytes[1] >> 7 == 1) { decoded.humidity +=0.5 } |
| 53 | + } |
| 54 | + if(input.bytes[2] != 255 || input.bytes[3] != 255) decoded.temperature = ((input.bytes[2]<<24>>16 | input.bytes[3]) / 10); |
| 55 | + |
| 56 | + return { |
| 57 | + data: decoded, |
| 58 | + warnings: [], |
| 59 | + errors: [] |
| 60 | + }; |
| 61 | +} |
| 62 | +``` |
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