Receive wireless sensor for outdoor temperature/humidity like TX29, TX29DTH-IT or similar models.
Compile, Test, Install
Wire RFM as shown, compile (make), test (/tmp/rfm69_lacrosse --debug) and install (sudo make install).
Use the -format Parameter to specify how the received Sensors shall be printed.
Also there is support for publishing via MQTT:
To publish the received Sensors via MQTT, install prequesites via sudo apt-get install libmosquitto-dev, and set (USE_MOSQUITTO = 1) in the Makefile.
Use the -format Parameter to specify the topic how the received Sensors shall be published.
You must include the =sign in the format string as delimiter between the topic and the payload.
See -help for a reference of the MQTT- and format variables.
Wiring:
Wire a rfm69 module to the spi pins of a raspberry as shown below.
The RFM's IRQ-Pin D0 is optional.
If provided/wired (-irq <GPIONUM>), it can be used for interrupt driven data reception ("Pin Change Detect").
If not provided/wired (-noirq), then polling is used (about 1/10 seconds), which is fast enough and not CPU-hungry.
Raspi Pinout-Header:
+--+--+
3,3V | 1|2 | 5V
GPIO-02 (SDA1) | 3|4 | 5V
GPIO-03 (SCL1) | 5|6 | GND
GPIO-04 (GPCLK0) | 7|8 | GPIO-14 (TxD)
GND | 9|10| GPIO-15 (RxD)
GPIO-17 (CE1') |11|12| GPIO-18 (PCM,CE0')
GPIO-27 |13|14| GND
GPIO-22 |15|16| GPIO-23
RFM-~ 3,3V |17|18| GPIO-24
RFM-~ GPIO-10 (MOSI) |19|20| GND
RFM-~ GPIO-09 (MISO) |21|22| GPIO-25
RFM-~ GPIO-11 (SCLK) |23|24| GPIO-08 (CE0) RFM-NSS
RFM-~ GND |25|26| GPIO-07 (CE1) RFM-D0 (optional)
EE_SDA |27|28| EE_SCL
GPIO-05 |29|30| GND
GPIO-06 |31|32| GPIO-12
GPIO-13 |33|34| GND
GPIO-19 (MISO') |35|36| GPIO-16 (CE2')
GPIO-26 |37|38| GPIO-20 (MOSI')
GND |39|40| GPIO-21 (SCLK')
+--+--+
Usage example:
pi@raspi$ rfm69_lacrosse -format "@H:@M:@S: %x_%t=%v %u\\n"
18:17:45: temp_2c=+12.0 C
18:17:45: humid_2c=72 %
18:17:45: batt_new_2c=0
18:17:45: batt_weak_2c=0
18:17:46: temp_c0=+20.9 C
18:17:46: humid_c0=76 %
18:17:46: batt_new_c0=0
18:17:46: batt_weak_c0=0
18:17:46: temp_58=+10.1 C
18:17:46: humid_58=89 %
18:17:46: batt_new_58=0
18:17:46: batt_weak_58=0
