To partially answer my own question, I have found useful information about the cam webserver API here: https://github.com/easytarget/esp32-cam-webserver/blob/master/API.md In short, there are a few other useful endpoints, like /status and /control. In order to change resolution, the uri to access would be http://<IP-ADDRESS>/control?var=framesize&val=8 Not all the commands in the link work, unfortunately (and, quite important, the 'save_prefs' does not) but it can be used to programatically access and save frames at the specific resolution one wants, which is all I need. It appears that the cam webserver is the standard ESP32 CameraWebServer, but I could not find an official API doc just yet. Some more info here: https://github.com/espressif/arduino-esp32/blob/master/libraries/ESP32/examples/Camera/CameraWebServer/app_httpd.cpp I find it odd that a simple API documentation of the CameraWebServer is not offered on the product page, it would be most useful.

You need to define a label on the internal and another one on the external screen in the setup. In your screen update function (or your main loop) set them to the same value (or variable) and update both screens. As long as you use pre defined labels it is easy. It doubles the code for updateing but fix the issue. If you want to draw lines or print free text you have to deal with the different resolution an aspect ratio and calculate the coordinates. That require some smart thinking but is still far away from witchcraft.

Hello @Ivanks I think that is a perfectly valid solution. Thanks for sharing. Thanks Felix

Thank you, but the is too much off a hassle, will come up with another solution. Regards

@davelondon The ISO unit is electrically isolated. The thermocouple converter is isolated from the Unit and your M5Stack controller by a SPI isolation chip. see schematic: https://docs.m5stack.com/en/unit/KMeterISO Unit The standard Kmeter is not. -Terry

Hi the solution is Turning of the PSRAM in tools in the arduino IDE. Also you need to go outside for signal. If you have "no gps connection" try to switch the tx and rx pin in the ss.begin()

In this testing environment I wired it to the 3.3 volt output of the Stamp. Not the best solution, ha ha, given the power the SIM7080 module needs. I am now converting it to powering the SIM7080 module with separate 5 volt line. That should do the trick.

@kombistack Hello @Kombistack With Arduino IDE, Core2 AWS and when I use Port C Blue the examples works. You need to change RX 16 to 13 and TX 17 to 14 in the INO sketch : synth.begin(&Serial2, UNIT_SYNTH_BAUD, 13, 14); And in the file "M5UnitSynth.h": void begin(HardwareSerial *serial = &Serial2, int baud = UNIT_SYNTH_BAUD, uint8_t RX = 13, uint8_t TX = 14); Happy Midi ;-)

Thanks ajb2k3, I did manage to get my Stamp Pico working with both a PIR sensor and relay unit. The problem was my fault. In soldering on the grove connector to the Stamp Pico, I soldered it on the wrong side of the board so when I connected a grove cable - ground was connected to GPIO 33, 5v was connected to GPIO 32, GPIO 32 was connected to 5v and GPIO 33 was connected to ground. Fortunately I didn't cook my board.

@teastain In Arduino you can uise the PCA9548 library . Example : https://randomnerdtutorials.com/tca9548a-i2c-multiplexer-esp32-esp8266-arduino/

@doko178 said in Cardputer pinout: Guys, How to get to stamp pinout? There's this topic https://www.reddit.com/r/M5Stack/comments/17lwkrd/i_was_disappointed_with_the_number_of_useful_pin/ but anyone tried some socket risers or other extnensions? From the M5Stamp product page on the M5Stack website. https://docs.m5stack.com/en/core/M5StampS3 PIN1.27

Thanks for working it out and sharing your results

Hello @frankqc Scenario A : PoESP32 runs default AT command firmware and is used as unit connected to anther core. Scenario B : PoESP32 runs alternate firmware, runs standalone and is not a unit. Re 1. : for scenario B try something like a generic ESP32 board, e.g. ESP32 Dev Module Re 2. : for scenario A like @robski mentioned the other core sends AT commands to the PoESP32 unit. See examples here - section Example/Arduino. Re 3. : for scenario B the Groove port should be usable for I2C. Re 4. : for scenario B see example here. Thanks Felix

You can find the firmware it came with and install it with the m5burner program. Download Page Go to the UIFLOW FIRMWARE BURNING TOOL section and download the version for your computer. When you open it, go to the stamps3 section and look for the User Demo firmware. I recommend trying out the User Demo Plus firmware that someone uploaded.

Please specify the vibrations you want to measure. There is a big difference between a mosquito landing on a concrete block and a earthquake that cracks the block. Both has to do with vibrations... The best will be to open the datasheets (both are linked) and compare. As far as I see the range and sensitivity are more or less similar for both sensors.