@simons
Another option... if you did not want to use wires/cables and I2C, you could go wireless and use ESP-Now. It’s really easy to implement in uiFlow as well. I’m not sure of your project requirements though. Just a thought. Good luck!
Hello - is there any news, how to show a noise level as textoutput. I want to do somethink link a child_to_loud_alarm
I use Pin 34 and get an value of 4095
best regards
Michael
I'm having a problem with my M5Go, it was working perfectly for weeks but since some hours i can't connect it to the PC anymore.
I tried 3 different wires and 2 different PC's
The CP210 driver has been reinstalled and all Software related things have been checked several times
It doesn't even show up in the device manager anymore....
Has anyone had a similar problem or has an idea how to solve it?
Thanks in advance
Hi, Now I got one solution by myself.
We can build a private environment of K210 machine learning on Goggle colaboratory.
Of course we can share.
I wrote an article here.
This can be used as an another way of V-Training for M5StickV and M5UnitV.
Qiita
https://qiita.com/Nabeshin/items/d526a94b8f3be85bbb05
Goggle colaboratory
https://colab.research.google.com/drive/1UdQV5nQMQy1ckJP0qdS3kS7sW6sEQyzs#scrollTo=prOt_VofnYCo
Thank you.
Hi all
My project has multiple screen pages.
At the moment I'm using m5button and it's working great, but if you define 2 buttons in the same screen space only one of them fires.
(I was originally going to set up a tonne of button handlers; all of which would check and only fire if the "currentPage" was the page they were on.)
So approach 1 doesn't work.
So I changed my definitons to create new pointer instances and accesing the functions via "->" instead, allowing me to create and dispose of them at will.
However of course when you invoke them from within a function or procedure in your main file the scoping is limited to the current function or procedure and they are automatically disposed of outside of that function.
So my solutions might be:
roll my own M5 button with disposal features.
Amend the M5 button in the core source and submit the changes to M5stack - this will fundamentally break everyones code. although its not a particularly painful fix I doubt it would be adopted. I dont know why they didnt support creation and disposal from the outset.
Just write my own button handler instead.
Does anyone have any comments or tips? Have I missed something that I can do effectively using m5button library?
I'm thinking I might do 1) but it's probably as much work as 3) - possibly more (as I do not need many of the features - just need touch and release.)
Is there any option for item 3) I can use from a 3rd party thats ready to roll?
thanks for any guidance
Jon
Hi guys
I went ahead and modified my M5Paper so it can put the touch IC (GT911) into sleep mode. By doing so the current (measured at the battery) drops about 7.6 mA.
With WiFi off, EDP power off, ESP32 in deep sleep and touch in sleep mode the overall current is about 1.6 mA.
Note: since putting touch into sleep mode requires touch INT to be driven low by ESP32, touching the screen can no longer be used to wake up M5Paper.
Cheers
Felix
Hi,
I'm currently using this small work-around to differenciate the power source between battery and USB.
It basically involves monitoring the voltage after initializing M5.BatteryADCBegin() (via M5.getBatteryVoltage() to be more precise). Measuring a voltage over 4200 mV (empirically evaluated!) indicates most of the time a USB-usage. Under that value, there are high chances that the device is on battery.
So far, this work-around is doing its job pretty well for me.
I hope it might help!
Cheers,
t.
When you install UIFlow and finish setting up the wifi, the API key will be displayed on the screen along with the mode and the network you have connected the device to.
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);
}
}
I found the following documents.
Command description
https://github.com/espressif/esptool/wiki/Advanced-Commands#write_flash_status
Source code
https://github.com/espressif/esptool/blob/master/esptool.py
L3499
def write_flash_status(esp, args)
GD25Q32C datasheet
http://www.elm-tech.com/ja/products/spi-flash-memory/gd25q32/gd25q32.pdf
@world101 said in M5Paper and API Key:
@ajb2k3 Actually, most of the time when I flash new firmware with M5Burner, it does assign a new API key to my device. Maybe that is because I always erase the flash before burning the firmware. I just tried it and it gave me a new API key.
@k33g give it a try. The Erase button is in the upper right corner of M5Burner. Then burn the latest M5Paper firmware.
I thought i was supposed to but for me, lately, it looked to always generate the same api.
@dov I'm very new to the M5Paper, but I'm wondering if you couldn't use the esp_deep_sleep_start() instead of shutdown because this will keep the RTC going and shutdown everything else.
In theory, you might be able to call esp_err_tesp_sleep_enable_timer_wakeup() with an appropriate duration and then simply continue. According to the documentation the Wifi connection data is kept as well.
I'm currently trying to work on something like this as well.
Hi @fonix232
thank you for the clarification. Yes, being able to wake up the system from shutdown mode via touch would be nice (like it is already possible using an RTC timer or alarm).
Thanks
Felix
Hi guys
I've found that the SD card only seems to be read when it already is inserted when M5Paper is booted / reseted. Or in other words, if M5Paper already is running when I insert the SD card it is not read and going to the Factory Test Test screen returns an SD card failed. On the other hand when the SD card has been recognised and I remove it and then go to the Factory Test Test screen the SD card still passes the test.
Which leads me to my question. In the M5Paper schematic the SD card detect line is connected to GPIO34 and I already verified that reading GPIO34 actually reflects whether an SD card has been inserted or not. Has anyone already tried to use this information?
Thanks
Felix
@world101 Thanks for your reply. For the project I have in mind, I just only need beeps, but if I'm going to hack around, I'll try to attach a speaker since it would allow me to do many other things. For programming I'd go with Arduino.
@lukasmaximus
Thanks Lukas, The problem was loading the font from the internal file system.
After delete all these, and place Serial.begin in the right orde loading of the fonts was no problem. Even my DSEG7Classic-Regular.ttf was loaded correct, and display correct. Converted it with the python file ttf2bin.py was also a succes in use.
One question remains. The command "createRender(168, 256)" is used for drawing bigger text, but are there limitations?
In my case when I put a larger value as 168 the screen still blanks, notting happens, but no error message shows up. The documentation is a bit fuzzy. Please can you explane this command.
