Search found 14 matches

by djipey
Wed Jan 22, 2020 8:36 pm
Forum: ESP32 boards
Topic: ESP32S and adapter board
Replies: 11
Views: 760

Re: ESP32S and adapter board

Perfect, thank you for your detailed reply, you answered just before I edited my last message :) I didn't know about the response time of the capacitors, but it makes sense. One more question: why is the ESP32 so much more complicated than the ESP8266 ? I don't need all these peripherals to use an E...
by djipey
Wed Jan 22, 2020 8:22 pm
Forum: ESP32 boards
Topic: ESP32S and adapter board
Replies: 11
Views: 760

Re: ESP32S and adapter board

Thank you, I finally managed to boot and flash the board, thanks to your procedure. I didn't use the buttons on the adapter board, just the side connections and two 10k resistors on the breadboard. Once flashed, I was able to access the python prompt and do some stuff, but as you mentioned, as soon ...
by djipey
Sun Jan 19, 2020 12:45 pm
Forum: ESP32 boards
Topic: ESP32S and adapter board
Replies: 11
Views: 760

Re: ESP32S and adapter board

Ok roger that, my adapter board is crap. I'll order the one you suggested. That said, I'd like to understand what I did wrong. I understand the pull up resistors are there to ground the EN and GPIO0 pins when the buttons are pressed. I tried to connect these pins directly to the ground (I just used ...
by djipey
Sat Jan 18, 2020 9:20 am
Forum: ESP32 boards
Topic: ESP32S and adapter board
Replies: 11
Views: 760

Re: ESP32S and adapter board

To get the buttons working right? But I could potentially deal without them. The adapter boards I have for my ESP8266 don't have any buttons.
by djipey
Fri Jan 17, 2020 10:39 pm
Forum: ESP32 boards
Topic: ESP32S and adapter board
Replies: 11
Views: 760

Re: ESP32S and adapter board

I might be interested by the adapters you mentioned if they are plug-n play, without soldering.

In the mean time, I would like to try and make my adapters work. Do I need the resistors?
by djipey
Fri Jan 17, 2020 8:41 pm
Forum: ESP32 boards
Topic: ESP32S and adapter board
Replies: 11
Views: 760

ESP32S and adapter board

Hi, I'm trying to upload micropython on my ESP32 WROOM (the bare chip). I got it from here, with the adapter board: https://www.banggood.com/ESP32-ESP-WROOM-32-IoT-Wifi-WLAN-BLE-ModuleESP-32S-Adapter-Pinboard-Converter-Board-p-1468284.html?rmmds=myorder&cur_warehouse=CN I soldered the chip on the ad...
by djipey
Tue Jan 14, 2020 9:09 pm
Forum: Programs, Libraries and Tools
Topic: umqtt.robust: ensure that broker received the message
Replies: 10
Views: 1137

Re: umqtt.robust: ensure that broker received the message

By the way, I never replied to the thread. I found a way to solve my problem: with uping and a nightly firmware (uping needs a recent implementation of websockets to work properly), I can first ping the broker. If a ping can reach it, I send the data. If not, I try to reconnect to the network. It wo...
by djipey
Sun Jan 05, 2020 6:50 pm
Forum: ESP8266 boards
Topic: ESP12e: analog reading not working with voltage divider
Replies: 4
Views: 179

Re: ESP12e: analog reading not working with voltage divider

I got the divider to work, by using 2x 220k ohm resistors as R1 and a 470k ohm as R2. I span the range 420/975 mv (in water, in air) vs 1.2/2.5V (water, air) directly from the sensor. Thanks for spotting impedance was the problem.
by djipey
Sun Jan 05, 2020 5:32 pm
Forum: ESP8266 boards
Topic: ESP12e: analog reading not working with voltage divider
Replies: 4
Views: 179

Re: ESP12e: analog reading not working with voltage divider

I'm a beginner in electronics so I'm not sure about what "Can the sensor drive an impedance as low as 320Ω?" really means. But I can measure the voltages coming from the sensor, I have a multimeter. Directly from the sensor (no voltage divider), I have 2.5V when the sensor is in the air, and 1.2V wh...
by djipey
Sun Jan 05, 2020 3:53 pm
Forum: ESP8266 boards
Topic: ESP12e: analog reading not working with voltage divider
Replies: 4
Views: 179

ESP12e: analog reading not working with voltage divider

Hi, I'm trying to read from an analog sensor (a capacitive soil moisture sensor). I'm using a ESP12E, not a development board, so the ADC pin can only take 1V max. Since my sensor can output up to 3V, I need a voltage divider to not fry my board. Here is my wiring: https://imgur.com/4NYRfzt Could yo...