See RasPi device tree commit for pi3-disable-bt and raspi forum thread discussion. We also need to run to stop BT modem trying to use UART To disable onboard Pi3 Bluetooth and restore UART0/ttyAMA0 over GPIOs 14 & 15 modify: One hack is to force the CPU to a lower speed ( add core_freq=250 to /boot/cmdline.txt)which cripples the Pi3 performance.Ī better solution for the emonPi is to disable BT and map UART1 back to UART0 (ttyAMA0) so we can talk to the emonPi in the same way as before. However UART1 is software UART and baud rate is dependent to clock speed which can change with the CPU load, under voltage and temperature therefore not stable enough. The easiest app to check this is minicom. However on the Pi3 these pins are mapped to UART1 since UART0 is now used for the Bluetooth module. is the UART assigned to the Linux console (which depends on the Raspberry Pi model). the Raspberry Pi and attempting to send a few commands to the FONA using a serial communications application. The emonPi communicates with the RasPi via GPIO 14/15 which on the Model B,B+ and Pi2 is mapped to UART0. The latest emonSD for emonPi / emonBase seemed to work out of the box with the RasPi3, however it became apparent that something rather important was rial comms with the emonPi's ATmega328! In that tutorial, I discussed all the necessary steps for setting up your Raspberry Pi (this is Raspberry Pi Computer not the Pico) like downloading the tools, SDK, examples and programming Pico with a Blinky example.
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