I got them from https://github.com/rotvalli/css-gauge ... they are pretty.
I used them in https://github.com/CraigeHales/RedClock , in https://github.com/CraigeHales/RedClock ... ckServer.c search for makegauge

agree about memory leaks. Something like this unsigned int totFreeBytes() { // Total free bytes in the heap. Equivalent to multi_free_heap_size(). heap_caps_get_info(&sMHIT, MALLOC_CAP_INTERNAL | MALLOC_CAP_8BIT); return sMHIT.total_free_bytes; } static unsigned int total_allocated_bytes() { // Tota...

I've got a similar project, thanks for the idea about enabling/disabling the converter. In my case I think I'm going to have to add an external reset button. 15F of super-capacitor decays very slowly after the ESP32 shuts down, maybe hours around 2 volts. It prevents a normal restart when the power ...

@thezcx - Can you post a picture showing what you are doing? Sounds interesting. I've used this on a wroom32 (pcb antenna) with a streaming wifi web socket: static int8_t const sPowers[] = {8, 20, 28, 34, 44, 52, 56, 60, 66, 72, 80}; ... ESP_ERROR_CHECK_WITHOUT_ABORT(esp_wifi_set_max_tx_power(sPower...

Start by testing the power supply with a scope.
Simulate some brownouts and see what happens.
If you added a large capacitor >= 1mf to the enable pin for programming, try removing it.
Get a better supply; make sure you have not added more filter capacitance than it can handle.

check the Q1 part number. Double check the pinout. The scope ground must be connected to the circuit ground (not a motor pin.) https://electronics.stackexchange.com/questions/21498/help-with-tip122-darlington-transistor hints the 10K resistor might be too big. Scope probe to the base on Q1: It's bee...

If the line[] data might have characters beyond 0x7F then I think you have to cast to unsigned char before any conversion to int. Otherwise they become negative numbers. The cast to unsigned char does not generate code, it just interprets 8-bit patterns with the high bit set as numbers > 0x007F rath...

use isdigit((unsigned char)(line[4])) The problem is not the 4, it is because char is really signed char and isdigit is warning about numbers > 127 will be negative indexes without the cast. Something changed, probably the isdigit definition. (good, it is safer now.) The cast does not generate code;...

Found the upload part, it did use curl in a shell script...Sorry, don't have anything else. I kind of remember needing to read server logs to figure out some of the answers. raspistill -q 15 -n -rot 180 -w 2592 -h 1944 -t 5000 -o /run/shm/temp.jpg > /run/shm/cmra.log curl -k -i -F "name=camera5" -F ...

here's a snip of some php not used in the last 7 years but worked with a raspberry to do about the same thing. Might point you somewhere...as I recall, returning messages from the server to the pi as html was a good debugging technique. You could send the returned html page to the serial console. Ca...