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Based on page 174 in the usermanual (https://drive.google.com/file/d/1TogN8KUzQKUH1DTtjWBQA1aFVhquG_PJ/view?pli=1) install the python rpc library pip install rpyc log in as root and create the following server.py file # server.py # server.py import rpyc from rpyc.utils.server import ThreadedServer from subprocess import PIPE, run @rpyc.service class TestService(rpyc.Service): PINS = {2:"pwmchip5"} def bash(self, cmdstr:str): '''Run shell command Args: cmdstr (str): shell command string ''' try: cmd = run( cmdstr, stdout=PIPE, encoding="ascii", shell=True ) except Exception as e: print(cmdstr) print(e) @rpyc.exposed def pwm(self, pin: int, period: int, duty_cycle: int) -> str: '''Set PWM Args: pin (int): wiringpi pin number period (int): set period duty_cycle (int): set duty cycle Returns: str: _description_ ''' chip = self.PINS[pin] c1 = f"echo 0 > /sys/class/pwm/{chip}/export" c2 = f"echo {period} > /sys/class/pwm/{chip}/pwm0/period" c3 = f"echo {duty_cycle} > /sys/class/pwm/{chip}/pwm0/duty_cycle" c4 = f"echo 1 > /sys/class/pwm/{chip}/pwm0/enable" for cmdstr in [c1,c2,c3,c4]: self.bash(cmdstr) return f"Success: {pin=} {period=} {duty_cycle=} {chip=}" @rpyc.exposed def disable(self) -> str: self.bash("echo 0 > /sys/class/pwm/{chip}/pwm0/enable") return 'Success' print('starting PWM server') server = ThreadedServer(TestService, port=18811) server.start() This can be automatically started at boot and as root using crontab Then use the following snippet as the regular non root user import rpyc connection = rpyc.connect("localhost", 18811) print(connection.root.pwm(2, 20000000, 5000000)) This creates a 50Hz where the pwm arguments are (pin, period, duty_cycle) you may need to add to or edit line 8 in the server code to set up your pwm pins PINS = {2:"pwmchip5"} You may need to enable these pins as per page 172 of the doc above (see image below)

For anyone else here's what worked for me. 1. Download latest armbian image from here https://www.armbian.com/orangepi-5/ 2. Follow the instructions at the youtube video below to install the image to EMMC. Ensure you use the armbian image. This image won't load as mentioned above 3. Burn the same image to sdcard and install sdcard in pi 5b. I used Rufus on Win11 (https://rufus.ie/en/) 4. Boot up. SD card boots as default 5. Edit the armbianEnv.txt file in the /boot folder and replace the line: fdtfile=rockchip/rk3588s-orangepi-5.dts with fdtfile=rockchip/rk3588s-orangepi-5b.dts 6. reboot 7. NB! unmount the current /boot folder using the following command in terminal sudo umount /boot This unmounts the current boot partition stored in the sdcard 8. use terminal to open gparted sudo gparted 9. Select the EMMC drive from the top right dropdown 10. Right-click on boot partition and mount on /boot. This mounts the boot partition of the emmc drive 11. edit txt file as per 5. above 12. shutdown and remove sdcard 13. reboot 14. using terminal run the command below to setup pi. Bluetooth/Wifi were working perfectly sudo armbian-config 15. Still working on GPIO access ..... 😶‍🌫️. If anyone has any tips to get this working through Python please let me know.