Search found 147 matches

by ESP_Dazz
Wed Jun 20, 2018 3:42 am
Forum: ESP32 IDF
Topic: ADC1 on Adafruit Feather HUZZAH-ESP32 doesn't work with esp-idf
Replies: 7
Views: 2260

Re: ADC1 on Adafruit Feather HUZZAH-ESP32 doesn't work with esp-idf

When I run the code above on the EPS32 Wrover Kit, the results are inverted (where connecting an A1_x channel to GND results in a reading of 4095, and connecting to HIGH results in 0). I think there might be something wrong with your ADC and GPIO configuration code. I've modified the example as foll...
by ESP_Dazz
Mon Mar 19, 2018 3:46 am
Forum: ESP32 Arduino
Topic: ESP32 ADC Non-linear Issues - How do I fix / change Attenuation or width?
Replies: 40
Views: 33984

Re: ESP32 ADC Non-linear Issues - How do I fix / change Attenuation or width?

vseven wrote:Can you comment if there will there be a revision number or indication printed on the chips that have this new factory calibration
Please contact the sales team at sales@espressif.com, they can help with this question
by ESP_Dazz
Tue Jan 23, 2018 7:18 pm
Forum: Hardware
Topic: About the CAN controller.
Replies: 173
Views: 95161

Re: About the CAN controller.

C does not allow initialization of arrays and structures after declaration, therefore the following will not compile //Does not compile CAN_frame_t my_frame; my_frame.data.u8 = {1 ,2 ,3 ,4 ,5 ,6, 7, 8}; CAN_frame_t my_frame = {0 , 0 , 33, 4, 255, 255, 255, 254, 123, 77}; The reason this works is bec...
by ESP_Dazz
Mon Jan 08, 2018 8:29 am
Forum: Hardware
Topic: About the CAN controller.
Replies: 173
Views: 95161

Re: About the CAN controller.

The CAN output control register doesn't actually exist as the ESP32 CAN peripheral only consists of the controller portion and requires an external transceiver functionality. One of the likely causes of the ESP32 not outputting anything during transmission could be due to the RX pin not being able t...
by ESP_Dazz
Sun Dec 31, 2017 11:06 am
Forum: Hardware
Topic: ESP32 ADC Calibration curves?
Replies: 17
Views: 11020

Re: ESP32 ADC Calibration curves?

Please take a look at the following link
https://esp-idf.readthedocs.io/en/lates ... alibration
Calibration for 11db attenuation is not very good as 11db attenuation does not have a linear response. Adding a 0.1uf capacitor can also help with the noise.
by ESP_Dazz
Tue Oct 31, 2017 6:45 am
Forum: ESP32 Arduino
Topic: ESP32 ADC Non-linear Issues - How do I fix / change Attenuation or width?
Replies: 40
Views: 33984

Re: ESP32 ADC Non-linear Issues - How do I fix / change Attenuation or width?

Hi everyone, the ADC calibration issue has actually been addressed in the esp-idf. Please see https://esp-idf.readthedocs.io/en/latest/api-reference/peripherals/adc.html#adc-calibration and https://github.com/espressif/esp-idf/tree/4048db35b6a1ac4216150480dcacdc4230f0baa2/components/esp_adc_cal . Es...
by ESP_Dazz
Fri Jun 02, 2017 7:44 am
Forum: Hardware
Topic: WROVER and RGB LED
Replies: 21
Views: 8603

Re: WROVER and RGB LED

I've been able to control each RGB LED individually with no issue. I've also tried every permutation of turning the RGB LEDs On/Off with no issue as well.

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