BLE Moisture Sensor FW

Description

This repo contains the code for my BLE moisture sensor, based on the SPBTLE-1S device.

Link to the HW repo

It's basicaly a BLE emitting beacon containing the raw value of a capacitive sensor

Build

IDE

The project is build in Keil V5 ( License is free for Cortex-M0 devices )
The software pack used is : Keil.STBlueNRG-1_DFP.1.2.0

Feature

Pushbutton to power on the device with self maintained circuit
Shutdown pin from the MCU to turn off the device
Button input to to actions
- Keep the device from sleeping
- Actions TBD
Device is always sleeping and should wakeup when timer elapsed
Will burst advertising beacon when awake ( 100ms )

Advertising packet

0x02
- Instruction is 2 bytes
- 0x01
  - AD_TYPE_FLAGS, // Next byte will contain flags
- 0x06
  - FLAG_BIT_LE_GENERAL_DISCOVERABLE_MODE | FLAG_BIT_BR_EDR_NOT_SUPPORTED,
0x07
- Next instruction is 7 bytes
- 0x08
  - AD_TYPE_SHORTENED_LOCAL_NAME, // Local name
- [ 6 Bytes for the name]
  - Exemple : 'S', 'B', 'M', 'S', '0', '0',
0x12,
- manufacturer specific data will contain 18 bytes
  - 0xFF
    - AD_TYPE_MANUFACTURER_SPECIFIC_DATA
  - 0xFFFF
    - Company identifier code (
      - Default is 0x0030 for STMicroelectronics
      - FFFF = No identifier
  - [ 4 bytes ]
    - Sys voltage ( mV )
  - [ 4 bytes ]
    - Sensor Value
  - [ 4 bytes ]
    - SPARE
  - [ 3 bytes ]
    - Flags ( todo )

The advertising packet should look like : 02 01 06 07 08 xx xx xx xx xx xx 12 FF FF FF xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx

MAC Address

uint8_t address[6] = { 0x00,0x00,0x00,0xE1,0x80,0x02 };
                         ^^------This is the sensor number