Search found 317 matches

by loboris
Mon Mar 04, 2019 7:26 am
Forum: Drivers for External Components
Topic: TI ADS1219 ADC driver
Replies: 8
Views: 443

Re: TI ADS1219 ADC driver

A noob question here. If it is a 24bit ADC and your Vref is 3.3v then the sensitivity it has to read is 3.3v/(2**24) = 0.00000019669532775878905 volts What sort of hardware would be needed to decouple and isolate the ADC so that such fine voltages are not just inducted from the air?? I have used th...
by loboris
Sun Feb 10, 2019 10:00 am
Forum: General Discussion and Questions
Topic: Free RAM on MicroPython boards
Replies: 37
Views: 23164

Re: Free RAM on MicroPython boards

As for the 8MB RAM it's not clear to me how this is going to be utilised for MicroPython. Upper 4MB cannot be used for MicroPython heap. It can be used for storing data or for RAM file system , I'm working on a driver for it. It will enable very fast writing speeds (practicaly the same as read spee...
by loboris
Wed Jan 30, 2019 8:41 am
Forum: General Discussion and Questions
Topic: Help writing SPI library (FT813 lcd driver)
Replies: 9
Views: 528

Re: Help writing SPI library (FT813 lcd driver)

@vitormhenrique

You can check this EVE library used on my ESP32 MicroPython port, It is fully working and it should be no problem to convert it for PyBoard (change the low level SPI functions).
The MicroPython module is here.
by loboris
Sat Jan 26, 2019 9:01 pm
Forum: Other Boards
Topic: New implementation of MicroPython for K210
Replies: 5
Views: 466

Re: New implementation of MicroPython for K210

@Roberthh

I've fixed the issues with ampy and rshell.
ampy works fine, directory listing with rshell is little slow. other things works, I'll check it more before committing the changes...

BTW, this Forum could be a better place to discuss issues related to this MicroPython port.
by loboris
Fri Jan 25, 2019 11:11 pm
Forum: Other Boards
Topic: New implementation of MicroPython for K210
Replies: 5
Views: 466

Re: New implementation of MicroPython for K210

I noticed that you used a quite old version of pye ... Thanks for reminding me, I'll certainly update the pye module. As you said, still a lot of work to do. It took some time to familiarize myself with K210 hardware and software (plus the freertos-sdk required quite a few changes to make it work p...
by loboris
Fri Jan 25, 2019 12:03 pm
Forum: Other Boards
Topic: New implementation of MicroPython for K210
Replies: 5
Views: 466

New implementation of MicroPython for K210

New implementation of MicroPython for Kendrite K210 (MaixPy) based on FreeRTOS is now available.

For more information see the announcement on my Forum.
by loboris
Tue Jan 22, 2019 8:59 pm
Forum: General Discussion and Questions
Topic: Charging 3,7v LiPo battery
Replies: 6
Views: 376

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: 296

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: 2
Views: 229

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.