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Using the Adafruit RFM69 radio with CircuitPython on the Zinqberry #CircuitPython #Radio #FPGA

Whitney Knitter posts on hackster.io about adapting Adafruit’s CircuitPython to use the RFM69HCW Radio on the Zynq-7000 series FPGAs.

One of my most commonly used Raspberry Pi shields I discovered a few years ago is the 433 MHz RadioFruit RFM69HCW Transceiver Radio Bonnet from Adafruit. The RFM69HCW is a transceiver module with a wide operating frequency range, and all of its major RF communication parameters are programmable. Most of these RF parameters can be dynamically set via the transceiver’s SPI interface from an external source.

This transceiver has the more unique feature of programmable narrow-band and wide-band communication modes. This is in thanks to the parameters that can be dynamically set via the transceiver’s SX1231 based SPI interface such as those controlling the power amplifier, filter settings, automatic frequency correction, and so on.

While it is possible to grab the datasheet for the RFM69HCW and start sending raw bits to the SX1231 SPI module to set the configuration and control registers of the radio, there are a couple of really good libraries that have written and proven in on a large array of platforms.

The RadioHead library provides a complete object-oriented library for sending and receiving packetized messages. A CircuitPython module for the RFM69 wraps this library in a way that allows for a user to easily write Python code to send and receive packets of data with the radio.

See the post for all the details. Great work!


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