mr-sven / x3d-rfm-esp32

X3D RFM69 ESP Interface

X3D RFM69 ESP Interface

User support with RF traces pictures and infos are very welcome. Also development support.

Note: work in progress

• Modulation: FSK PCM
• Frequency: 868.95 MHz
• FSK Frequency Deviation: 80 kHz
• 25 µs bit time
• 40000 baud
• based on Semtech SX1211
• manual CRC
• CCITT Data Whitening

Payload format:

• Preamble {32} 0xaaaaaaaa
• Syncword {32} 0x8169967e
• Length {8}
• Payload {n}
• CRC16(Poly=0x1021,Init=0x0000)

The RFM69HW module is based on Semtech SX1231H. The nearest target frequency is 868.950012 MHz, the internal AFC is able to take care on this gap.

X3D Protocol analysis: X3D-Protocol.md

X3D Messages: X3D-Message-Log.md

List of X3D Devices

Wireing

used:

• DOIT ESP32 DEVKIT V1
• RFM69HW 868 MHz

ESP32	RFM69
3V3	3.3V
GND	GND
D4	DIO0
D5	NSS
D18	SCK
D19	MISO
D23	MOSI

ESP Projects

The ESP sub projects based on ESP-IDF 5.x. Each project folder contains a vscode configuration.

• x3d-lib - Makefile gcc project to implement and test X3D generate and parsing lib.
• x3d-raw-monitor - Init the SX1231 chip with correct config for the X3D protocol and dumps packet hex over serial.
• x3d-raw-mqtt-publish - Publishes Raw packet binary over mqtt.
• x3d-controller - ESP32 Based X3D Controller Module Project. depricated
• ng-x3d-ctrl - Next Gen ESP32 Based X3D Controller Module Project.