Arduino Pro Mini + nRF24L01+ is a solution of choice for ... I’ve decided to build a single PCB board that embeds the brain (arduino) and the radio module (nRF24L01+) and is low power capable.

An Arduino Pro Mini is more than up to the task, and a custom PCB makes for a fairly neat installation. This isn’t the first time we’ve seen somebody replace the controller on one of these ...

After analyzing the communication between the two chips, [Alejandro] pulled the S3P70F4 off the board and wired an Arduino Pro Mini 328 in its ... up with a custom PCB adapter, we don’t think ...