Jan Jongboom / Mbed OS mdot_two_way

Two way data over LoRaWAN using Multitech mDot

Dependencies:   libmDot-mbed5

This is example firmware for the Multitech mDot. It demonstrates how to:

  • Do two-way data.
  • Sleep aggressively and only wake up when the wake-up pin is triggered.
  • Handle errors, retries and duty cycle errors.
  • Cache data in non-volatile storage.

Based on mbed OS 5.1, hard faults against mbed OS 5.3 unfortunately. Can be compiled with GCC and ARMCC (but not IAR).

To do a new transmission, short pin D6 / PA_1.

README.md@0:20fbd6f66b11, 2017-01-03 (annotated)

Committer:
janjongboom
Date:
Tue Jan 03 13:20:36 2017 +0000
Revision:
0:20fbd6f66b11
Child:
1:b604a2d6c54d
Initial commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
janjongboom 0:20fbd6f66b11 1 # LoRa Soap dispenser
janjongboom 0:20fbd6f66b11 2
janjongboom 0:20fbd6f66b11 3 Smart soap dispenser that sends out stuff over LoRa. Does not build with GCC, only ARMCC (also with mbed CLI).
janjongboom 0:20fbd6f66b11 4
janjongboom 0:20fbd6f66b11 5 ## Setup
janjongboom 0:20fbd6f66b11 6
janjongboom 0:20fbd6f66b11 7 1. Set jumper JP95 (next to RESET button) to the two pins closest to the mDot.
janjongboom 0:20fbd6f66b11 8 2. Attach something that generates an interrupt on D6 / PA_1.
janjongboom 0:20fbd6f66b11 9 3. RFID code needs to be implemented, currently spits out a random ID.
janjongboom 0:20fbd6f66b11 10
janjongboom 0:20fbd6f66b11 11 To get data into Device Connector:
janjongboom 0:20fbd6f66b11 12
janjongboom 0:20fbd6f66b11 13 1. First get keys by exchanging a device cert for LoRa keys at http://apm-lora-eu2.cloudapp.net:5101.
janjongboom 0:20fbd6f66b11 14 2. Add the keys to ``main.cpp``.
janjongboom 0:20fbd6f66b11 15 3. Then under 'Resources' add:
janjongboom 0:20fbd6f66b11 16
janjongboom 0:20fbd6f66b11 17 ```
janjongboom 0:20fbd6f66b11 18 {
janjongboom 0:20fbd6f66b11 19 "dispenser/0/value": {
janjongboom 0:20fbd6f66b11 20 "mode": "r",
janjongboom 0:20fbd6f66b11 21 "defaultValue": "0"
janjongboom 0:20fbd6f66b11 22 },
janjongboom 0:20fbd6f66b11 23 "meta/0/timestamp": {
janjongboom 0:20fbd6f66b11 24 "mode": "r",
janjongboom 0:20fbd6f66b11 25 "defaultValue": ""
janjongboom 0:20fbd6f66b11 26 },
janjongboom 0:20fbd6f66b11 27 "meta/0/ids_seen": {
janjongboom 0:20fbd6f66b11 28 "mode": "r",
janjongboom 0:20fbd6f66b11 29 "defaultValue": ""
janjongboom 0:20fbd6f66b11 30 }
janjongboom 0:20fbd6f66b11 31 }
janjongboom 0:20fbd6f66b11 32 ```
janjongboom 0:20fbd6f66b11 33
janjongboom 0:20fbd6f66b11 34 4. Under 'Process Data' add:
janjongboom 0:20fbd6f66b11 35
janjongboom 0:20fbd6f66b11 36 ```js
janjongboom 0:20fbd6f66b11 37 function (bytes) {
janjongboom 0:20fbd6f66b11 38 var ids = [];
janjongboom 0:20fbd6f66b11 39 for (var i = 0; i < (bytes.length - 2) / 4; i++) {
janjongboom 0:20fbd6f66b11 40 var c = bytes.slice(2 + (i * 4), 2 + (i * 4) + 4);
janjongboom 0:20fbd6f66b11 41 ids.push((c[0] << 24) + (c[1] << 16) + (c[2] << 8) + (c[3]));
janjongboom 0:20fbd6f66b11 42 }
janjongboom 0:20fbd6f66b11 43
janjongboom 0:20fbd6f66b11 44 return {
janjongboom 0:20fbd6f66b11 45 "dispenser/0/value": (bytes[0] << 8) + bytes[1],
janjongboom 0:20fbd6f66b11 46 "meta/0/timestamp": new Date().toISOString(),
janjongboom 0:20fbd6f66b11 47 "meta/0/ids_seen": ids.join(',')
janjongboom 0:20fbd6f66b11 48 };
janjongboom 0:20fbd6f66b11 49 }
janjongboom 0:20fbd6f66b11 50 ```
janjongboom 0:20fbd6f66b11 51
janjongboom 0:20fbd6f66b11 52 5. Click 'Save' and your data should show up in Device Connector (after the next transmission).