u/3geETR

I want to be sure there are no issues before I order the PCB.

I'm using an nRF52840 Pro Micro with an E22-900M30S LoRa module. 5V power is supplied to the E22 via a boost converter, and I'm using a CN3165 charging module.

Gerber files if needed: https://video.craftea.studio/u/gerber.zip

I designed a PCB using a 1W E22-xxxM30S LoRa module and an nRF52840 Pro Micro. Are there any problems?

I used 0.3mm for the power traces and 0.2mm traces for everywhere else.

I used a trace width of 1 mm, and there is a 0.15 mm gap between the RF trace and GND. PCB will be a 2-layer board, 1.6 thick, and made of FR-4

I calculated it using this site: https://chemandy.com/calculators/coplanar-waveguide-with-ground-calculator.htm

Whether I set Clearance value to 0.1, 0.15, or 0.2, it stays at 0.2, only if I go above 0.2, it changes. Where can I adjust this?

I checked with the manufacturer; it can handle 0.1, and the recommended minimum is 0.15, so I’ll probably use 0.15.

Hello, I’ve designed a PCB that I’ll be sharing as open source; it will be called OpenMesh A.

- I’ll be using the nRF52840 Pro Micro board as the main board

- It will be compatible with the E22-xxxM22S and E220-xxxM22S LoRa modules

- It will include a TP4056 charging IC, though this is optional

Currently, there’s an SMA connector, but I miscalculated the routing for it. To fix this, I either need to extend the PCB or remove the SMA connector entirely. What do you think I should do?

Would you use this instead of a board like FakeTec? Do you have any other suggestions?

Hi, Is there any issue with my LoRa+NRF52840 PCB? There are excess at the corners, will this cause problems during production?

I paid attention to the width of the trace leading to the SMA connector; I used a 0.33mm trace there. The rest of the PCB uses 0.2mm traces. I didn't add a via around the SMA connector, but should I?

Hi, while trying to set up two devices as Remote Admin (PKI Admin), Managed Device mode was enabled on both devices before everything was configured.

Neither device can be managed anymore, and when attempting to erase the firmware, it doesn't work. The correct erase file is being flashed to the NRF52840, but nothing changes.

Device is DIY NRF52840 node

These devices aren't mine; I'm writing this in a friend's name and will forward the incoming messages to him.

I couldn't find any headers like the one in the photo(It's edited). There are headers with two long ends, but no headers with two short ends. Or maybe I just couldn't find it.

Hello, I’m planning to build a PCB using the Nrf52840 Pro Micro and E22-400M22S, but I haven’t figured out how to connect the E22. Should I connect it to DIO2, or should I connect the RX TX instead? I can’t find any clear instructions anywhere. The connection diagrams show DIO2 and DIO3, but there are no corresponding pins on the NRF side. Also, it says there’s no TXCO in the diagram, but there is.