Posts made by Thomasx

Hi

Did anyone make, and share, some code (I code in C using Arduino IDE and/or PlatformIO/VSCode) for a rotary dial on the core2 touch-screen?
Or a slider?

Hi

How do I setup PlatformIO in VSCode so I can write apps for the M5Stack Core 2, i.e. get the libraries into VSCode/PlatformIO? I seem to only be able to install them specifically for a single project.

Can I get the examples easily into VSCode/PlatformIO, like in the Arduino IDE?

Thanks

@felmue

Yes, but since none of these function calls reside in my code, but (I assume) in libraries, I would have expected this to be handled by using M5Core2.h and choosing the correct target in the IDE.

I can't see what else to change, other than replacing some libraries, but what to replace, and with what, in that case.

Hi

I have some code that compiles and runs fine for Core
So I replaced M5Stack.h with M5core.h and compiled it for the Core2 and downloaded.
But it just keeps rebooting.

Here's what I get in the serial window. Any suggestions on what is wrong and needs to be adapted to make Core-code work in a Core2?

Rebooting...
M5Core2 initializing...axp: vbus limit off
axp: gpio1 init
axp: gpio2 init
axp: rtc battery charging enabled
axp: esp32 power voltage was set to 3.35v
axp: lcd backlight voltage was set to 2.80v
axp: lcd logic and sdcard voltage preset to 3.3v
axp: vibrator voltage preset to 2v
E (1455) ledc: ledc_channel_config(369): gpio_num argument is invalid
touch: FT6336 ready (fw id 0x10 rel 1, lib 0x300E)
OK
E (3029) rmt: rmt_set_gpio(526): RMT GPIO ERROR
E (3029) rmt: rmt_config(686): set gpio for RMT driver failed
[i] SDK:          'v4.4-beta1-189-ga79dc75f0a'
[i] CPU Speed:    240 MHz
[i] Chip Id:      43F23A08
[i] Flash Mode:   00000002
[i] Flash Size:   01000000
[i] Flash Speed:  80 MHz
[i] Heap          261868/288324
[i] SPIRam        4192139/4192139

[i] Starting
[WiFi] Connecting...
OTA Ready
[i] read status from SPIFFS
[i]   Setup MQTT
[REL] setting 0 to OFF
[REL] setting 1 to OFF
[REL] setting 0 to ON
[REL] setting 1 to ON
[REL] setting 0 to OFF in 2000 ms
[REL] setting 1 to OFF in 5000 ms
Guru Meditation Error: Core  1 panic'ed (LoadProhibited). Exception was unhandled.

Core  1 register dump:
PC      : 0x400df248  PS      : 0x00060733  A0      : 0x800dfae4  A1      : 0x3ffb2710  
A2      : 0xffffffff  A3      : 0x00000003  A4      : 0x00060720  A5      : 0x00000000  
A6      : 0x007b764c  A7      : 0x003fffff  A8      : 0x3f410ab4  A9      : 0x00000058  
A10     : 0xffffffab  A11     : 0x00000084  A12     : 0x3ffc9ebc  A13     : 0x00060723  
A14     : 0x00060720  A15     : 0x00000001  SAR     : 0x0000000a  EXCCAUSE: 0x0000001c  
EXCVADDR: 0x00000058  LBEG    : 0x40086565  LEND    : 0x4008656d  LCOUNT  : 0x00000027  


Backtrace:0x400df245:0x3ffb27100x400dfae1:0x3ffb2740 0x400dff3f:0x3ffb2770 0x400d4031:0x3ffb27b0 0x400d4170:0x3ffb27e0 0x400d5bc3:0x3ffb2800 0x400ea60d:0x3ffb2820 




ELF file SHA256: 0000000000000000

Rebooting...

Hi

I am trying to use GPIO16 as input on an M5Stack Core, but it does not work.
I tried using GPIO35 instead and that worked fine.

But I want this signal on GPIO16. Any ideas on how to make that work?
When searching for info on this I have not found any info that it shouldn't work. In general it says that it should work to use GPIO16 both as output and input.

I am using GPIO17 as output and that is working fine.

I thought I had LoRaWan868 but it seems I have LoRaWan (as they are black)

The blue ones I think are called just LoRa868, this one-
https://shop.m5stack.com/products/lora-module-868mhz?variant=31093175910490

I see there is also a module called LoRaWan868 but that has a different formfactor, not stackable.

It said clearly in the spec sheet for the module I have, I have double checked, that it should work with P2P.

THe module I linked in the OP is the one I have. It is named I think LoRaWAN, and it supports the 868 MHz band.

Thanks!

For some reason I had to remove the M5Stack library entirely from the libs-folder, then it worked. Annoying.

Finally I got the code to compile and download to the M5 without hanging it.

But transmission does not work, and after some debugging I found out that anything that is sent to the LoRa-module, is responded with "+ERROR: Command does not exist".

So at least the LoRa module is alive and communication with it is working. But the LoRa-library attached to this example seems not to match the M5 LoRaWAN module.

@felmue

Thanks!

I am trying to compile these, and they compile fine for Core, but I have a Core2, and then they don't compile, not even when M5Core2.h is included, with or without M5Stack.h

Any advice on how to get them to compile for Core2?

Hi

How can I change this code so it compiles for M5Stack-Core2 AWS instead of M5Stack-Core?

I tried replacing the M5Stack.h include with M5Core2.h but it didn't help. I also tried adding the latter to the first, but it also didn't help.

Thanks!

/*
    device_B.ino
*/

#include <M5Stack.h>
#include <LoRaWan.h>

#define SerialUSB Serial

unsigned char buffer[128] = {
    0,
};
uint8_t flag_test_868 = 0;

void key_scan(void *arg)
{
  while (1)
  {
    onReceive();
    // lora.loraDebug();
  }
  vTaskDelete(NULL);
}

void setup(void)
{
  M5.begin(true,true,true,false);
  SerialUSB.begin(9600);
  lora.init();
  delay(2000); // must delay for lorawan power on
  lora.initP2PMode(868, SF12, BW500, 8, 8, 20);
  M5.Lcd.setTextFont(2);
  M5.Lcd.println("Device B");
  M5.Lcd.setTextColor(BLUE);
  int core = xPortGetCoreID();
  // M5.Lcd.println(core);
  xTaskCreatePinnedToCore(key_scan, "key_scan", 2048, NULL, 0, NULL, 0);
}

void loop(void)
{
  // lora.loraDebug();
  if (M5.BtnA.wasPressed())
  {
    M5.Lcd.setCursor(0, 20);
    M5.Lcd.fillRect(0, 20, 320, 215, BLACK);
  }
  if (M5.BtnB.wasPressed()) //send data (433MHz)
  {
    flag_test_868 = 0;
    M5.Lcd.setTextColor(BLUE);
    init_433();
    send_data();
    delay(300);
    Serial2.print("AT+TEST=RXLRPKT\r\n");
        M5.Lcd.println("433M Init and Send \"Hello World\"...");
  }
  if (M5.BtnC.wasPressed()) //send data (868MHz)
  {
    flag_test_868 = 1;
    M5.Lcd.setTextColor(YELLOW);
    init_868();
    send_data();
    delay(300);
    Serial2.print("AT+TEST=RXLRPKT\r\n");
    M5.Lcd.println("868M Init and Send \"Hello World\"...");
  }
  M5.update();
}

void init_433()
{
  lora.initP2PMode(433, SF12, BW500, 8, 8, 20);
}

void init_868()
{
  lora.initP2PMode(868, SF12, BW500, 8, 8, 20);
}

void send_data()
{
  lora.transferPacketP2PMode("hello world");
}

void onReceive()
{
  short length = 0;
  short rssi = 0;

  memset(buffer, 0, 128);
  length = lora.receivePacketP2PMode(buffer, 128, &rssi, 1);

  if (length)
  {
    SerialUSB.print("Length is: ");
    SerialUSB.println(length);
    SerialUSB.print("RSSI is: ");
    SerialUSB.println(rssi);
    SerialUSB.print("Data is: ");
    if (flag_test_868)
    {
      M5.Lcd.print("868M Recv:  ");
    }
    else
    {
      M5.Lcd.print("433M Recv:  ");
    }
    for (unsigned char i = 0; i < length; i++)
    {
      SerialUSB.print((char)buffer[i]);
      M5.Lcd.print((char)buffer[i]);
      //   SerialUSB.print("0x");
      //   SerialUSB.print(buffer[i], HEX);
      //   SerialUSB.print(" ");
    }
    SerialUSB.println();
    M5.Lcd.println();
  }
}

Here's a couple of the first errors that occurs

In file included from C:\Users\Thomas Nilsson\Documents\Arduino\libraries\M5Core2\src/M5Core2.h:78,
from C:\Users\Thomas Nilsson\Documents\Arduino\M5-ProductExampleCodes\Module\LORAWAN\Arduino\lorawan_receiver\lorawan_receiver.ino:6:
C:\Users\Thomas Nilsson\Documents\Arduino\libraries\M5Core2\src/utility/M5Button.h:804:7: error: redefinition of 'class Button'
class Button : public Zone {
^~~~~~
In file included from C:\Users\Thomas Nilsson\Documents\Arduino\libraries\M5Stack\src/M5Stack.h:110,
from C:\Users\Thomas Nilsson\Documents\Arduino\M5-ProductExampleCodes\Module\LORAWAN\Arduino\lorawan_receiver\lorawan_receiver.ino:5:
C:\Users\Thomas Nilsson\Documents\Arduino\libraries\M5Stack\src/utility/Button.h:18:7: note: previous definition of 'class Button'
class Button {
^~~~~~

Hi

I got two LoRaWan868 for node to node communication. In my efforts to find some example code for this, I find a lot of posts here mentioning the module will not work for node to node communication. Is this correct, that it doesn't?

Because the specification is really clear that it does. Even the first sentence in the first paragraph in the M5-store states that it does?

So, will it work, or should I stop wasting my time?

If it works, is there any example code for node to node communication anyone could point me at?

Thanks!

Link to shop with description saying it supports node to node communication.

https://shop.m5stack.com/products/com-lorawan-module-868mhz-asr6501?variant=35580975186084

Hi

I got two Commu modules to use in an RS485 network.
However, to my surprise I find out it doesn't work because the RS485 transceiver chip has its Data input signal tied to ground, so it cannot transmit any data. Also, the enable signals are inverted, that may be a minor issue, but still the same. Extremely odd to "offer" something that will not work at all, and for seemingly no good reason what so ever.

Totally useless piece of junk! I will be extremely careful before buying any M5 stuff again.