dac_output_voltage(DAC_CHANNEL_1, 200) 200=8 bit, gives My200VoltV measured with external instrumentįloat My200Volt = 2. DO NOT FORGET TO WIRE PIN 25 WITH PIN 35 !!! Then we can see the differences between different ESP32.Ĭode: Select all // (C) 2019 Helmut Weber It would be interesting if someone can run it WITHOUT modification and report the results. Just let it run and start Serial Plotter. Here is a second program which includes the LUT of MY Esp32. If (delta>4) Serial.print(" ") Serial.println(x>4) Serial.println("Calculate corrected values. Serial.print("DoTest ") Serial.println(j) Arduino is about to release the Arduino MKR 1010 with ESP-32.ĭoes anyone know if this board will address the issue of ADC non linearity? If this is the case, can someone with knowledge point me in the right direction (if the fix is code), or can someone let me know how to source a chip with the fix? (version number, etc.) if the chip has been produced yet.Ģ. Has the ADC non linear issue been fixed as previously indicated by ESPRESSIF? The role played by internal voltage reference (VREF) is still not totally known (to me at the very least).ġ. Readings are noisy (but this is by far not the worst issue as this can be dealt with by using capacitors and or statistical sampling, etc.)ĭ. Readings are unstable and unpredictable (the same setup/code/circuit produces different readings over time),Ĭ. Analog readings are non linear in nature (channels 0, 3 and 6),ī. A shame really, as the prospect of being able to use a chip with a decent number of Analog inputs was great.Ī. Because of this, using ESP-32 for production still appears out of the question. Syntax Serial.println (val) Serial.println (val, format) Parameters Serial: serial port object. This command takes the same forms as Serial.print (). As many on this thread, I have experienced the problematic Non-Linearity of the ESP32 ADCs. Description Prints data to the serial port as human-readable ASCII text followed by a carriage return character (ASCII 13, or '\r') and a newline character (ASCII 10, or ' ').
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