Posts made by ckuehnel

@m5stack It works now as expected.

I tried the example for MQTT Unit and it works on Public Broker of Hivemq.com. But, I can see messages with a distance of one minute. In the serial output of the M5Atom I used, I can see the following in the meantime.
...
MQTT disconnected
MQTT disconnected
+MQUNCONNECT
+MQCONNECT
MQTT disconnected
MQTT disconnected
MQTT disconnected
MQTT disconnected
MQTT disconnected
+MQCONNECT
+MQUNCONNECT
MQTT disconnected
MQTT disconnected
MQTT disconnected
...
What is responsible for the disconnection?
How can I sent MQTT messages in a ten seconds cycle, for example?

I bought this unit but had no success configuring the device.
Scanning with an I2C scanner result in an I2C address 0x35. The microchip standard is 0x60.
Are there examples for M5Stick or Seeeduino XIAO?

@felmue said in Core2 PortC not working:

GPSRaw.begin(9600, SERIAL_8N1, 13, 14);// GPS init

Hi @felmue

Thanks a lot. It works. I small hint in the documentation would be nice.

Ciao Claus

I tried GPSRaw.ino on Core2 but get no response from GPS Unit.
Is there a special initialization required?

@felmue It seems to me that I measure not the battery voltage. The voltage is always around 4.8 V and this could be the voltage after the SY7088. So I can use that voltage as an indicator for enough battery voltage only. If I have schematics then I have the chance to a little bit deeper. Until now I did not find the schematics, yet.
Ciao Claus

After looking into Github I must see that the installed library differed from the library at Github now.
After updating the compilation worked and I can test the internal battery voltage over time.

@felmue I tried the same w/o success. I will go into Github to look for.

How to deepsleep a CoreInk. The shutdown() gives a compiler error. Any idea?

Get error message at installation. What can I do?

Bild Link)

I want to use the PowerC as a backup battery for the small internal.
I use your program example and it works.
After switching on the PowerC I can see the external Vbat and seconds later PowerC switches off and I can see the internal Vbat. This is not the expected behavior. Additionally, the switch loses its membrane already (after 20 presses).

@hugo I do not have this problem.
Two quick&dirty proposals: 1. double sided tape between M5StickC and the hat or 2. drill two holes into the back of the hat and you can fix the M5StickC by two screws.

I build a handheld thermometer based on M5StickC, 18650 hat and ENV hat.
Now I am looking for the possibility to check the status of the 18650 LiPo and show it on TFT (see my blog).

If I connect the SIM800L module to the M5Stack Basic Core I get always Resets as in the screenshot shown

Is there enough power over the USB connector to source that combination? SIM800L can have spikes till 2 A.

I have connected a GoBottom w/ 600mAh LiPo but that's not enough. What can I do in this case?

Is there Arduino code available? I have some problems with the examples added to the library.

What's the content?

I connected an DS18B20 w/ pullup to the Grove connector and want to readout temperature. No success.
Connecting it to the header GND, VCC and G26 it works as expected.
I tried G32 and G33 at Grove w/o success.
What's wrong there?

Here is a working code example:

/*

• Test of IP5306 functions
  */

#include <M5Stack.h>

void setup()
{
// initialize the M5Stack object
M5.begin();
Wire.begin(); // required to access IP5306
M5.Lcd.fillScreen(BLACK);
M5.Lcd.setCursor(0, 10);
M5.Lcd.setTextColor(WHITE);
M5.Lcd.setTextSize(2);
M5.Lcd.printf("IP5306 Function Test\r\n");

if(!M5.Power.canControl())
{
M5.Lcd.setTextColor(RED);
M5.Lcd.printf("No communication with IP5306 chip");
while(1);
}
}

void loop()
{
M5.Lcd.fillRect(0,180,360,60,0);
uint8_t bat = M5.Power.getBatteryLevel();
M5.Lcd.setCursor(0,180);
if (M5.Power.isCharging()) M5.Lcd.printf("Battery is charging\r\n");
else M5.Lcd.printf("Battery is not charging\r\n");
M5.Lcd.printf("Battery Level %d", bat);
M5.Lcd.progressBar(0, 220, 360, 20, bat);
delay(5000);
}