Search found 320 matches

by loboris
Tue Jan 22, 2019 8:59 pm
Forum: General Discussion and Questions
Topic: Charging 3,7v LiPo battery
Replies: 6
Views: 1119

Re: Charging 3,7v LiPo battery

The LiPo charger charging current only indicates the maximum current it can provide. So, you can safely charge 500 mAh battery with the 5A LiPo charger or charge 6000 mAh battery with 500 mA charger. The charger circuitry and the battery chemistry will take care to charge the battery at the right ra...
by loboris
Sun Jan 20, 2019 10:40 am
Forum: ESP32 boards
Topic: estimating battery life
Replies: 2
Views: 826

Re: estimating battery life

You can easily test the battery life experimentally. As the power consumption during deep sleep is minimal, just use the minimal sleep time (for example 10-100 ms) and see how long your system runs on battery. Multiply the measured battery life time with sleep time/run time ratio. The actual battery...
by loboris
Sat Jan 12, 2019 8:15 am
Forum: ESP32 boards
Topic: How to use SIM800l connect internet with network.socket?Thanks
Replies: 3
Views: 962

Re: How to use SIM800l connect internet with network.socket?Thanks

There is a gsm module in my MicroPython port which makes it possible to use any network related function with GSM the same way as with WiFi.
by loboris
Wed Jan 02, 2019 8:56 am
Forum: ESP32 boards
Topic: ESP32 deepsleep failed, the interpreter will not run to the deepsleep line
Replies: 4
Views: 1053

Re: ESP32 deepsleep failed, the interpreter will not run to the deepsleep line

Your main() never exits, it has an infinite while loop in it (two of them!).

BTW, when posting a code, put it in the code block!
by loboris
Sat Dec 29, 2018 9:30 am
Forum: Hardware Projects
Topic: NeoPixel using microPython
Replies: 4
Views: 1148

Re: NeoPixel using microPython

You put the development board on the breadboard, then solder the wires to it! :?
by loboris
Sun Dec 23, 2018 7:34 pm
Forum: General Discussion and Questions
Topic: Can i store arbitrary data in RTC_DATA_ATTR for ESP32
Replies: 3
Views: 1094

Re: Can i store arbitrary data in RTC_DATA_ATTR for ESP32

This is supported in my Micropython port. Up to 64 32-bit integers can be saved in RTC memory. One string of up to 2048 characters can be saved in RTC memory. The string can be, for example, json string containing the parameters which has to be restored after deep sleep wake-up. Integers and string ...
by loboris
Sat Dec 22, 2018 8:33 am
Forum: ESP32 boards
Topic: Virtual Memory RAM
Replies: 4
Views: 870

Re: Virtual Memory RAM

Is ESP32 for micropython support 8M psRAM now? I'm testing the support for the 2nd half of the 8MB SPIRAM in my MicroPython port. As the access is based on bank switching (there is no other way to use it), it is not suitable for MicroPython heap, but it will be possible to use it for storing data. ...
by loboris
Fri Dec 21, 2018 9:12 am
Forum: ESP32 boards
Topic: Virtual Memory RAM
Replies: 4
Views: 870

Re: Virtual Memory RAM

You should use ESP32 board/module with 4MB psRAM (SPIRAM), then you can have up to 4MB free RAM (heap).
by loboris
Mon Dec 17, 2018 8:44 pm
Forum: Other Boards
Topic: K210(Sipeed M1) run face tracking PT demo with maixpy
Replies: 9
Views: 3785

Re: K210(Sipeed M1) run face tracking PT demo with maixpy

I've tested the PT face tracking demo and it works very well. I've had some issues using kflash.py (on Ubuntu 18.04) to upload the firmware. The upload speed was extremely slow , no difference if used with 115200 or 2000000 bd and always failed after some time. Then I've tried using -l option and th...
by loboris
Fri Dec 14, 2018 10:42 pm
Forum: ESP32 boards
Topic: ESP32 broken filesystem
Replies: 4
Views: 1093

Re: ESP32 broken filesystem

Using SPIFFS or LittleFS for internal file system may help as they are both more resilient to power loss (by design) than FatFS.