Adding Wireless Capability to Custom RP2040/RP2350 Projects: Pi Radio Module 2 - Anyone tried it?

RE: Adding Wireless Capability to Custom RP2040/RP2350 Projects: Pi Radio Module 2 - Anyone tried it?

shabaz — Wed, 05 Aug 2026 21:26:10 GMT

Here's a board attempt with two wireless modules (both don't need to be populated).

Circuit diagram:

The unusual board shape is needed to fit over the main PCB:

The Sub-1GHz module (eByte E07-900MM10S) is not intended for LoRa, but the footprint is pin-compatible with a LoRa module (E22-900MM22S) if desired, but that uses a couple of extra pins, which I didn't wire up (they would need to be patched to GPIO pins on this current board).

RE: Adding Wireless Capability to Custom RP2040/RP2350 Projects: Pi Radio Module 2 - Anyone tried it?

shabaz — Wed, 15 Jul 2026 17:26:22 GMT

Here's an attempt (the link to the KiCad files and Gerbers has been placed in the blog). The board size is 50 x 23 mm, which costs £6.67 for ten PCBs (I will populate these by hand, the parts are large and easy to solder), including tax/shipping. A combined board with this and CC1101 would be good, I might try that at some later point, since I can see use-cases for both together.

RE: Adding Wireless Capability to Custom RP2040/RP2350 Projects: Pi Radio Module 2 - Anyone tried it?

shabaz — Tue, 30 Jun 2026 21:51:29 GMT

Using the schematic mentioned by [mention:330078c07ce64e488ea3c5c4fc602342:e9ed411860ed4f2ba0265705b8793d05] just four GPIO connections are needed to the RP2040, and I was curious roughly were the module could fit on a minimal RP2040 design (e.g. (+) Making a Custom RP2040 Project with KiCad, Part 1! - element14 Community ). The illustration here shows the four required connections in yellow, and approximately where the module could be placed so traces could be routed easily (I'm not planning to do this with the particular circuit I'm working on, but will consider it for future, or maybe place a SIL header there, for wiring up later.

Aside from those four connections, GND and 3.3V is needed of course (The Pimoroni Pico 2 W uses a ferrite bead on the supply), and the module has three GPIO, one of which is used for an LED, and another is wired to a potential divider attached to the USB 5V supply, but seems unnecessary (I don't think the firmware does anything with that, it is just for developer use if they want to see if the USB supply is present, so I think that could be omitted if it simplifies PCB routing).

RE: Adding Wireless Capability to Custom RP2040/RP2350 Projects: Pi Radio Module 2 - Anyone tried it?

wolfgangfriedrich — Tue, 30 Jun 2026 17:46:06 GMT

When I saw this, my first thought was: put it on some sort of m.2 carrier for a more universal wireless card. But the interface does not seem to be fully compatible with whatever m.2 has to offer.

RE: Adding Wireless Capability to Custom RP2040/RP2350 Projects: Pi Radio Module 2 - Anyone tried it?

veluv01 — Tue, 30 Jun 2026 17:16:16 GMT

The pimoroni pico plus 2W has it.The schematic is available for it.

Apparently, it can only be used with the rp2040 and rp2350's.

RE: Adding Wireless Capability to Custom RP2040/RP2350 Projects: Pi Radio Module 2 - Anyone tried it?

embeddedguy — Tue, 30 Jun 2026 17:12:12 GMT

Would be nice to add some sub-ghz module. You can have better range with that.!