Search found 6 matches

by pontificator
Sun Jan 14, 2018 10:35 pm
Forum: General Discussion
Topic: ESP-WROOM-32 specifications
Replies: 5
Views: 9870

Re: ESP-WROOM-32 specifications

Reapeating the same question:

Why ESP-32 consumes 120 mA average? It should consume 80 mA as per documentation. I have checked several development boards, all consume more than promised. All ESP-32 are quite warm.
by pontificator
Mon Nov 06, 2017 3:37 am
Forum: General Discussion
Topic: The reception performance of WiFi?
Replies: 1
Views: 4628

Re: The reception performance of WiFi?

I guess you use ESP-WROOM-32 module. Try ESP-WROVER-32 module with an external antenna.

I've got an impression that ESP-WROOM-32 modules have problems with antenna matching.
by pontificator
Mon Nov 06, 2017 12:48 am
Forum: General Discussion
Topic: Bad usb cable horror - please add warning to docs & getting & started
Replies: 1
Views: 4539

Re: Bad usb cable horror - please add warning to docs & getting & started

ESP-32 consumes a lot of current while transmitting. I saw spikes of 0.7A with duration of 0.5 ms. If you have USB cable with resistance of about 2 Ohm, then those spikes might cause reset. Use a 1000 uF capacitor across +3.3V rail. After that it should work with any USB cable. I saw those 0.7A spik...
by pontificator
Tue Oct 31, 2017 10:17 pm
Forum: General Discussion
Topic: ESP-WROOM-32 specifications
Replies: 5
Views: 9870

Re: ESP-WROOM-32 specifications

after uploading sketch in serial monitor I see ascii character ??
There are several sketches named WiFiScan: for WiFi shield, for ESP8266 and for ESP32. I should upload the sketch for ESP32.
by pontificator
Mon Oct 30, 2017 10:37 pm
Forum: General Discussion
Topic: ESP-WROOM-32 specifications
Replies: 5
Views: 9870

ESP-WROOM-32 specifications

Hi, When I compare ESP-WROOM-32 datasheet with ESP-WROOM-02 datasheet, the specs looks almost identical: average current consumption 80 mA, sensitivity -91dBm @ 11 Mbps. But when I test real modules, their performance differs drastically. Running Arduino WiFiScan sketch on ESP-WROOM-32 and on ESP-12...
by pontificator
Fri Oct 27, 2017 11:46 pm
Forum: General Discussion
Topic: ESP32 Power consumption considerations
Replies: 10
Views: 154246

Re: ESP32 Power consumption considerations

Hi, Using an oscilloscope I have measured current consumption of DOIT ESP32 DevKit with ESP-WROOM-32 module running Arduino WiFiScan demo sketch. While executing WiFi.scanNetworks() function very first time, module consumes average current of 0.5A for 10 ms with four peaks of approx. 0.7A during tha...