<![CDATA[My Tab5 Extended GPIO and Power management library.]]>Hi all;

This is something I've been working on; a easy way of taking control of the Tab5's power management circuitry from vanilla MicroPython; without needing a special board build.

https://codeberg.org/easytarget/tab5-egpio-micropython

The README there has the full install and usage notes; plus a list of the (30!) methods it provides. This is deigned to be very simple in use; it is self-contained and lets you:

  • Control power on/off for the WiFi chip, Speaker Amplifier, USB-A port and Expansion port 5V power.
  • Switch WiFi between internal and external antennas
  • Enable and disable battery charging, set the quick charge status, read the charge indicator pin.
  • Read the battery voltage and current in/out.
  • Detect if headphones are plugged in.
  • Set LCD backlight brightness
  • Trigger a poweroff event.
  • Send reset signals to the LCD, TouchPanel and Camera modules.

Use it to create a power control object and set the device up as you need:

from tab5_egpio import TAB5_EGPIO

tab5pwr = TAB5_EGPIO()
tab5pwr.wlan_pwr_on()
tab5pwr.charge_enable()

# later (let the charge controller settle first)
voltage, current = tab5pwr.battery_status()
print('Battery: {:.2f}V @ {:.3f}A'.format(voltage, current))

There are some demo's in the repo that show how to use this in more detail. And I have a page where I am documenting general hardware related Tab5 micropython information at: https://codeberg.org/easytarget/m5-tab5-micropython

[note: I'm cross-posting this here from the micropython official discussions, since it is specific to the Tab5]

]]>https://community.m5stack.com/topic/7990/my-tab5-extended-gpio-and-power-management-libraryRSS for NodeWed, 29 Apr 2026 16:17:43 GMTSat, 03 Jan 2026 14:27:05 GMT60<![CDATA[Reply to My Tab5 Extended GPIO and Power management library. on Tue, 13 Jan 2026 20:02:58 GMT]]>@felmue
Thank you! you are quite right! I hadn't really looked at what was happening properly :-(

The pin needs to be toggled high then low with a ~50ms delay for a full power off, just toggling it high does a full reset (after 1 second). I really wish there was a state diagram (or similar) available for the code in the PMS150G power control MCU.

I've extended my code to do the required pulse similar to your modification, and added a reset_device() method too. Plus relevant notes in the README etc, and done a new release.

[testing shows that the poweroff happens immediately after the first pulse, I'm not sure why they attempt to pulse several times but I guess they are just making sure.. ;-)]

]]>https://community.m5stack.com/post/30452https://community.m5stack.com/post/30452Tue, 13 Jan 2026 20:02:58 GMT<![CDATA[Reply to My Tab5 Extended GPIO and Power management library. on Fri, 09 Jan 2026 02:59:43 GMT]]>Hello @easytarget

for me your current implementation to turn off M5Tab5 actually only does a reset.

The power off pulse needs to pulse to turn off M5Tab5. See here.

I modified poweroff_now function in your library like below:

def poweroff_now(self):
        """Instant full power off. Be sure you want to use this!"""
#        self._e2.set_output(_PWROFF_PULSE_PIN, HIGH)
        for x in range(10):
            self._e2.set_output(_PWROFF_PULSE_PIN, LOW)
            sleep(0.05)
            self._e2.set_output(_PWROFF_PULSE_PIN, HIGH)
            sleep(0.05)

and now my M5Tab5 turns off.

Thanks
Felix

]]>https://community.m5stack.com/post/30424https://community.m5stack.com/post/30424Fri, 09 Jan 2026 02:59:43 GMT