Search found 21 matches
- Sat Jan 30, 2021 5:21 pm
- Forum: ESP8266 boards
- Topic: Power I2C sensor from GPIO pin: not enough power to refresh?
- Replies: 0
- Views: 1100
Power I2C sensor from GPIO pin: not enough power to refresh?
Hello, I have an ESP12E, 4MB flash loaded with micropython. I would like to read from an I2C sensor. I can do this without trouble when the power pin of the I2C sensor (a BMP280) is connected directly to the power pin of the board. However, I would like to connect the power pin of the sensor to one ...
- Fri Sep 11, 2020 7:15 pm
- Forum: Other Boards
- Topic: GT832E_01 (NRF52832): unplug/plug FTDI adapter to get prompt, why?
- Replies: 0
- Views: 1882
GT832E_01 (NRF52832): unplug/plug FTDI adapter to get prompt, why?
Hello, I finally managed to flash a GT832E_01 board. For the original post describing the board and what I tried, see here: https://forum.micropython.org/viewtopic.php?f=12&t=8924. I'll add the final procedure there if someone is interested. However, now that the board is flashed (and works, I'll co...
- Thu Aug 27, 2020 6:55 am
- Forum: Other Boards
- Topic: [M5stack atom] power board custom solution
- Replies: 0
- Views: 2172
[M5stack atom] power board custom solution
Hi, I recently bought a M5stack atom "board": https://m5stack.com/collections/m5-atom/products/atom-lite-esp32-development-kit I want to play with it and disassemble it for other projects, I'm not interested with the enclosure and the M5 ecosystem. However, the M5 stack atom contains a pico board th...
- Fri Aug 21, 2020 6:04 pm
- Forum: Other Boards
- Topic: Flashing a GT832E_01 (NRF52832): where to start?
- Replies: 0
- Views: 2282
Flashing a GT832E_01 (NRF52832): where to start?
Hello, I recently bought a few of these little guys: https://www.aliexpress.com/item/32845674676.html And I would like to put micropython on them. The chip is the classic NRF52832. They have a CORTEX-M4, 512K FLASH and 64K RAM. It should be more or less ok for micropython and some basic code. I sold...
- Thu Jun 18, 2020 10:16 am
- Forum: ESP8266 boards
- Topic: ESP01: power I2C sensor from board instead of battery
- Replies: 2
- Views: 3042
ESP01: power I2C sensor from board instead of battery
Hi, I recently made a small setup to report temperature, pressure and humidity every 10 minutes. The system is made of: - ESP01 - BME280 (it's an I2C sensor) - Battery (CR 123, lithium). This battery provides a ~3.3V current during its lifetime, no need to level the voltage I made some hardware modi...
- Thu Jun 11, 2020 4:11 pm
- Forum: Other Boards
- Topic: Simple cheap small board: NRF52 ?
- Replies: 8
- Views: 103980
Simple cheap small board: NRF52 ?
Hi, I know that similar questions were asked before, but after browsing quite a lot of threads on the forum, I couldn't find exactly what I need. In short, I would like to find a board that matches all these conditions: - cheap (< 10 €) - has bluetooth - small (something like 20x30 max) - has 2.54 m...
- Sun Mar 22, 2020 8:03 am
- Forum: ESP32 boards
- Topic: Waveshare eink 2in7 screen flockering after power cycle
- Replies: 1
- Views: 1652
Waveshare eink 2in7 screen flockering after power cycle
Hi, I managed to fully use a Waveshare eink screen 2in7. I use this driver: https://github.com/mcauser/micropython-waveshare-epaper/blob/master/epaper2in7.py. I use to display information from sensors: temperature, humidity, etc. This is how I setup the screen: def setup_screen(): # SPIV on ESP32 sc...
- Wed Jan 22, 2020 8:36 pm
- Forum: ESP32 boards
- Topic: ESP32S and adapter board
- Replies: 11
- Views: 7884
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...
- Wed Jan 22, 2020 8:22 pm
- Forum: ESP32 boards
- Topic: ESP32S and adapter board
- Replies: 11
- Views: 7884
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 ...
- Sun Jan 19, 2020 12:45 pm
- Forum: ESP32 boards
- Topic: ESP32S and adapter board
- Replies: 11
- Views: 7884
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 ...