these are two RP2040 'bones' boards that have an RFM69 900MHz module soldered in the empty spot, good for making basic wireless networks that have support for addressing and packeted data transmission. they can be transmitters or receivers, here both have the same code on them and when we press the user button on one feather, the opposite ones displays a message on the OLED with the RSSI. this makes it easy for me to verify the antenna quality. theres also a uFL antenna spot so we can connect big antennas using a uFL to SMA adapter - we covered finding these adapters on the Great Search this week! next up we will try RFM9x LoRa modules, those can run a LoRaWAN stack on the roomy RP2040 chip.

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