@terence-faul any solution so far?

I found this:

create a file, e.g. mysensors_bootloader_130_8Mhz.json and save it to ~/.platformio/boards/

{
  "build": {
    "core": "arduino",
    "extra_flags": "-DARDUINO_ARCH_AVR -DARDUINO_AVR_PRO",
    "f_cpu": "8000000L",
    "mcu": "atmega328p",
    "variant": "standard"
  },
  "frameworks": [
    "arduino"
  ],
  "fuses": {
    "efuse": "0xFE",
    "hfuse": "0xD2",
    "lfuse": "0xE2",
    "lock": "0x0F",
    "unlock": "0x3F"
  },
  "name": "MySensorsBootloader 1.3.0 (Atmega328P@8M,3.3V)",
  "upload": {
    "maximum_ram_size": 2048,
    "maximum_size": 30720,
    "protocol": "arduino",
    "require_upload_port": true,
    "speed": 57600
  },
  "url": "http://www.mysensors.org",
  "vendor": "MySensors"
}

the platformio.ini should look like this:

[env:mysensors_bootloader_130_8Mhz]
platform = atmelavr
framework = arduino
board = MYSBootloader_8MHz.hex
src_build_flags = -I/Users/dirk/Arduino/libraries/MySensors

lib_deps =
  # Using a library name

but I do not know where to store the MYSBootloader_8MHz.hex

@mfalkvidd said in Atmega328 internal temperature sensor (yes it exists!):

hwCPUTemperature()

sorry, stupid question maybe, but with my 328p based sensors hwCPUTemperature() is not automatically callable using just
#include <MySensors.h> --> neither with 2.2.0 nor with 2.3.0

Do I have to include /hal/architecture/AVR/MyHwAVR.h ?
Cannot compile it, what path should I use in the #include statement?

@terxw all files from https://www.openhardware.io/view/562/simple-MySensors-MultiSensor-Board were sufficient, when I ordered my boards at allpcb. But you can create them with eagle on your own.

I always suggest to use caps wherever you power the board, because it "levels" or "balances" the current so it has more "stability". The resistor connected to reset is always needed as "pull-up", without that, the processor will either reboot or be unstable.

@thucar what display do you use and where did you buy it? What library did you use?

@ostoja look at this video with an explanation of this topic and how to handle the IDs
https://forum.mysensors.org/post/26597

@ostoja said in Multiple Relays + Motion sketch, fully customizable, optional timer, manual override:

// Present all sensors to controller
  for (int i=0; i<numSensors && i<MAX_ATTACHED_DS18B20; i++) {   
     present(i, S_TEMP);
  }

  // Register all sensors to gw (they will be created as child devices)
  for (int sensor = 1; sensor <= NUMBER_OF_RELAYS; sensor++) {
    present(sensor, S_BINARY, "Relay", ack);
  }

With this two "for" loops you set present(n) multiple times. in the first for() you start with 0 until MAX_ATTACHED_DS18B20-1, in the second for() you start with 1 until NUMBER_OF_RELAYS-1, so this will assign the sensors with identical IDs as the relays.
I have not checked the internal code of this method, but I would think that you should better user a different range in the second for() loop starting at least with MAX_ATTACHED_DS18B20+1.

Thanks, @tekka, but unfortunately I am still using the wrong code. I tried every combination, but as I am not sure what am doing here, I doubt to make progress.

set MOSI,SCLK,CE,CSN to OUTPUT -> SPI_DDR = _BV(SPI_MOSI) | _BV(SPI_SCLK) | _BV(CE_PIN) | _BV(CSN_PIN)
set PB2 to OUTPUT -> | _BV(PB2)
set MISO to INPUT -> | ~_BV(SPI_MISO)
and set CSN to output -> CSN_DDR = _BV(CSN_PIN);

The controller still doesn't recognize the node, so I cannot use OTA. But when I flash the sketch (with the CE and CSN pin defined to 8 and 9) with a programmer to an atmega328p with a standard bootloader it works, so my PCB seems ok.

#elif defined(SPI_PINS_CSN9_CE8)
	// set pin mode: MOSI,SCLK,CE,CSN = OUTPUT, MISO = INPUT
	// PB2 is SS pin has to be defined as OUTPUT, else SPI goes to slave mode
	SPI_DDR = _BV(SPI_MOSI) | _BV(SPI_SCLK) | _BV(CE_PIN)  | _BV(CSN_PIN) | _BV(PB2) | ~_BV(SPI_MISO);
	// set CSN = output
	CSN_DDR = _BV(CSN_PIN);
#endif

Looking to other bootloaders was no success, e.g. optiboot.

Thanks in advance for any hint or better some sample code.

@tekka I also did some changes to assign the SPI pins CSN to pin 9 and CE to pin 8.

So the code in the HW.hnow looks like this, but I am not sure how to change the initSPI() method:

#elif defined(SPI_PINS_CSN9_CE8)
	#define CSN_PORT	PORTB	// port for CSN
	#define CSN_DDR		DDRB	// DDR for CSN
	#define	CSN_PIN		PB1		// Arduino Pin 9 <-> Bit 1 of port B

	#define CE_PORT		PORTB	// port for CE
	#define CE_DDR		DDRB	// DDR for CE
	#define	CE_PIN		PB0		// Arduino Pin  8 <-> Bit 0 of port B
#endif

static void initSPI(void) {
	// Initialize the SPI pins: SCK, MOSI, CE, CSN as outputs, MISO as input
	#if defined(SPI_PINS_CE9_CSN10)
		// CSN_PIN (=PB2) is SS pin and set as output
		SPI_DDR = _BV(SPI_MOSI) | _BV(SPI_SCLK) | _BV(CE_PIN) | _BV(CSN_PIN);
	#elif defined(SPI_PINS_CSN7_CE8)
		// PB2 is SS pin has to be defined as OUTPUT, else SPI goes to slave mode
		SPI_DDR = _BV(SPI_MOSI) | _BV(SPI_SCLK) | _BV(CE_PIN) | _BV(PB2);	
		CSN_DDR = _BV(CSN_PIN);
	#elif defined(SPI_PINS_CSN9_CE8)
		// set pin mode: MOSI,SCLK,CE,CSN = OUTPUT, MISO = INPUT
		SPI_DDR = _BV(SPI_MOSI) | _BV(SPI_SCLK) | _BV(CE_PIN) | _BV(CSN_PIN) | ~_BV(SPI_MISO);
		// set CSN = output
		CSN_DDR = _BV(CSN_PIN);
	#endif

Is there any further code I have to change?

Thanks in advance for any hint, I am not used to code on that bit level and AVR macros.

What kind of Solid State Relay do you use? Can you switch 230V/4W LED bulbs with this Solid State Relay? I tried some "Songle" relays once and that causes the bulb to flicker all the time.