6 Mar
2022
6 Mar
'22
8:45 p.m.
I found a photo of the board. It looks like the bluetooth chip is under some shielding, but the FCC ID is printed: https://fccid.io/2ABCB-RPI4B In the internal photos FCC document they remove the shielding, revealing the chip underneath. It's unlabeled: https://fccid.io/2ABCB-RPI4B/Internal-Photos/Internal-Photos-4325659.pdf . This document also hilights where the antenna is. This is a lot of pdf files to look at on my tiny raspi. This document: https://fccid.io/2ABCB-RPI4B/User-Manual/Installation-Guide-4325624.pdf says this:
The Raspberry Pi 4 Model B+ module has an IEEE 802.11b/g/n/ac 1x1 WLAN, Bluetooth 5 and Bluetooth LE module based on the Cypress 43455 chip.