I am very inexperienced at electronics, but I have recently tried to connect a wireless chip to my microcontroller. I soldered some header pins to my board to allow me to remove the chip when needed or to change it.
Trying to test it by sending a message and printing it to a terminal on my PC.
However when I press send the chip doesn't appear to be working, but if I remove the chip and wiggle it about as I am inserting it the message sends. This indicates to me that there is a poor connection somewhere. But I have no idea how I would trace this.