12 Testing and qualification
12.1 Test hardware
The ExpressLink testing and qualification process requires a Raspberry Pi 4 single board computer and a hardware harness providing the following connections:

Figure 7 - RaspberryPi 4 I/O connections
The ExpressLink candidate will be attached to the GPIO header of the PI using the following pins.
ExpressLink function |
GPIO Pin Number |
---|---|
Command TX (Transmit from ExpressLink to Host) |
GPIO 15 |
Command RX (Receive from Host to ExpressLink) |
GPIO 14 |
Reset |
GPIO 23 |
Event |
GPIO 27 |
Wake |
GPIO 22 |
12.2 Test software
A test suite is provided by the AWS FreeRTOS service team to perform the ExpressLink Qualification, a program managed by the AWS Partner Network team.