This repository contains a script to help mass-reprogram Adafruit Bluefruit LE UART Friends, using UART cable that supports flow control. A 3.3V cable is recommended, but a 5V cable will work.
The circuit needs to be wired as follows:
The following cables are known to work:
Note that a cable that supports flow control is required! It needs to be setup for RTS/CTS flow control. or example, the following cables will not work:
- USB to TTL Serial Cable - Debug / Console Cable for Raspberry Pi
- SparkFun Beefy 3 - FTDI Basic Breakout
- SparkFun Serial Basic Breakout - CH340G
- SparkFun Serial Basic Breakout - CH340C and USB-C
- LilyPad FTDI Basic Breakout - 5V
- USB to TTL Serial Cable (5V VCC)
- SparkFun FTDI Basic Breakout - 3.3V
- SparkFun FTDI Basic Breakout - 5V