ENG-CANSAT-PICO-MISSION1-CAPTURE

Introduction

The following Wiring is used to capture

• Air temperature
• Air pressure

and transmitting the information via the RFM69HCW radio module.

Wiring on a Pico

Wire the barometric sensor

The BMP280 is wired on the I2C bus of the Pico.

Wire the temperature sensor

Then connect the TMP36 sensor as follows:

• The pin 1 (on the left) to a power source (3.3V),
• The pin 3 (the the right) to the ground/GND.
• The pin 2 (middle one) to the ADC0 (GP26) analog input.

Wire the radio module

Finally wire the RFM69HCW radio as follows:

Here is the description of wiring between the Pico and the RFM69 module.

RFM69HCW	PICO
RST	GP3
CS	GP5 (Slave Select)
MOSI	GP7 (Miso)
MISO	GP4 (Mosi)
SCK	GP6 (Clock)
GND	GND
VIN	3V3

Wiring on Kit Cansat for Pico

Wire the barometric sensor

The Kit Cansat avec Pico does already fire a StemmaQt/Qwiic connector. Just connect the Qwiic/StemmaQt wires between the board and the sensor. The Qwiic connector is wired to the I2C(0) bus.

The BMP280 is wired to the Pico via the Qwiic connector.

Wire the temperature sensor

Then connect the TMP36 sensor as follows:

• The pin 1 (on the left) to a power source (3.3V),
• The pin 3 (the the right) to the ground/GND.
• The pin 2 (middle one) to the ADC0 (GP26) analog input.

The Pico pad on the board are large enough to quickly solder the TMP36 on the board. The TMP36 can also bee soldered under the board.

Wire the radio module

Finally wire the RFM69HCW radio as follows

640px

RFM69HCW	UEXT pin	PICO	Remark
RST		GP3
CS		GP5	keep the same pin as receiver. Otherwise use UEXT 10 (=gp10)
MOSI	7		GP4 = MISO
MISO	8		GP7 = MOSI
SCK	9		GP6 = SCK
GND	2		PICO GND
VIN	1		PICO 3.3V

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Written by Meurisse D. for MCHobby