BLE scanning using Arduino environment on an ESP32, initially set up for Jinou temperature sensors
Example manufacturer data from 2 Jinou JO-0628 BLE temperature/humidity sensors:
001502002e045afe510aaad1aa
001508002d0261e50cd530712f
Breaks down into:
00 1508 00 2d02 61 e50cd530712f
00 [1508] 00 [2d02] [61] [e50cd530712f]
- Temperature
[1508]- 2-part hex
- [15] = decimal 21 (whole degrees)
- [08] = decimal 8 (tenths of a degree)
- 21.8°C
- 2-part hex
- Humidity
[2d02]- 2-part hex
- [2d] = decimal 45 (whole percent)
- [02] = decimal 2 (tenths of a percent)
- 45.2%
- 2-part hex
- Battery
[61]- hex
- [61] = decimal 97 (whole percent)
- 97%
- hex
- MAC address
[e50cd530712f]
- add wifi manager (or blufi) for easy setup
- add some config and control
- destination url
- interval, window, duration and delay between scans
- maybe have configurable service ID string to support other devices (doesn't make much sense if you need to change the code to parse the services)
- debug output (to be streamed like results)
- full tracking (to record all devices seen)
- stream results over MQTT or HTTP
- consider including total device count as a signal (possibly of room occupancy levels)