Topics tagged with core

Battery charging does not work on BASIC V2.7

sgflux — Tue, 03 Jun 2025 15:54:37 GMT

@sgflux I measured the voltage of the ‘5V pin’. With the V2.4 I get 5 V, with the V2.7 only 4.7V. Could this be the reason why it only charges with a maximum of 150 to 200mA? How can I increase the voltage output of the IP5306? Is this possible via i2c?

LAN connection possible?

the_hacker — Thu, 12 Dec 2024 19:30:03 GMT

@kuriko Thanks, I will try it.

Sleep / low power on Paper V1.1 without clearing the display on Wake?

simonm — Tue, 14 Nov 2023 01:06:00 GMT

@ajb2k3 thanks so much for that insight. Do you have an implementation of HV write mode for the Paper display in a different platform (UIflow etc)? Don't worry if not, because it seems that existing shutdown() is able to retain images according to @felmue's example.

UiFlow 2.0 Firmware locks up my Core3

Sun, 23 Jul 2023 19:43:31 GMT

M5Stack Basic Core stopped working

Thu, 05 May 2022 13:22:09 GMT

M5Paper partial Update Canvas

murraypaul — Thu, 11 Feb 2021 12:51:00 GMT

As mentioned in the other thread, the missing step is transferring the canvas framebuffer to the EPD. If your loop function is changed as below, it works as you expect. void loop() { for (int i=1; i<7; i++) { canvas1.drawString(testString[i],20,20); /* m5epd_err_t UpdateArea(uint16_t x, uint16_t y, uint16_t w, uint16_t h, m5epd_update_mode_t mode); */ M5.EPD.WriteFullGram4bpp((uint8_t*)canvas1.frameBuffer()); M5.EPD.UpdateArea(0,0,100,100,UPDATE_MODE_GL16); delay(1000); } }

M5Paper load font from sdcard

lukasmaximus — Sun, 10 Jan 2021 13:01:30 GMT

Hi @Powersoft please don't double post, and refer to my reply on your other post

Battery status?

OnRed — Tue, 13 Oct 2020 14:05:00 GMT

I've just started out but it looks like the following shows the voltage and mine maxed out at 4.178V, this gradually decreases and I think below 3.6V isn't really usable. You can use this and some testing to determine the percentage of battery. #include "M5StickCPlus.h" TFT_eSprite Disbuff = TFT_eSprite(&M5.Lcd); void setup() { M5.begin(); M5.Axp.ScreenBreath(8); M5.Lcd.setRotation(1); Disbuff.createSprite(240, 135); Disbuff.setTextColor(TFT_WHITE); } void loop() { Disbuff.fillRect(0, 0, 240, 135, TFT_BLACK); Disbuff.setCursor(10, 10); Disbuff.printf("BAT_V: %.3fV",M5.Axp.GetBatVoltage()); Disbuff.pushSprite(0,0); } There are other options power functions that may help in this doc: AXP192 (Power management) Good luck.

External library

SamueleBrunini — Tue, 09 Jun 2020 11:11:02 GMT

it's a library to control a sensor, I had already built my custom blocks that worked with that library, but when I updated everything I was unable to make it go. so do I have to import the library into the / flash root? and then?

M5Stick IMU Yaw Readings Off

hague — Fri, 01 May 2020 08:46:13 GMT

I have achieved quite good results with the Seeed Studio Grove 3-Axis Digital Compass V2. https://wiki.seeedstudio.com/Grove-3-Axis_Digitial_Compass_v2.0/