Hello! I'm working on a custom PCB that uses the STM32WB1MMCH6TR module, which was chosen specifically because of its integrated antenna. Unfortunately, with the first prototypes I'm getting extremely poor range with BLE, usually <-80 dBm even just a few inches away. This makes it near impossible to communicate with it from any useful distance. I made sure to turn the transmit power (CFG_TX_POWER in CubeIDE) all the way up to 6dBm, but it didn't help with the signal strength.
I was not able to find much information on designing a PCB around this module, so I just went based off the keep-out zone that came with the supplied footprint on Digikey. I suspect that there may be components too close to the antenna side of the module, but I want to ask for advice before ordering the next revision. Thank you!
