From 740fa92fd41e2c4dd5798d462fe4646d0cc6cc48 Mon Sep 17 00:00:00 2001 From: David Lechner Date: Mon, 27 Jun 2016 22:52:22 -0500 Subject: [PATCH] Add critical information for getting pi3-miniuart-bt overlay to work Bluetooth on RPi 3 using uart1 will not work without setting core_freq=250 in config.txt. This is not documented anywhere, so this seems like a good place to start. --- arch/arm/boot/dts/overlays/README | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) --- a/arch/arm/boot/dts/overlays/README +++ b/arch/arm/boot/dts/overlays/README @@ -691,7 +691,9 @@ Info: Switch Pi3 Bluetooth function to N.B. It is also necessary to edit /lib/systemd/system/hciuart.service and replace ttyAMA0 with ttyS0, unless you have a system with udev rules that create /dev/serial0 and /dev/serial1, in which case use - /dev/serial1 instead because it will always be correct. + /dev/serial1 instead because it will always be correct. Furthermore, + you must also set core_freq=250 in config.txt or the miniuart will not + work. Load: dtoverlay=pi3-miniuart-bt Params: