Search found 146 matches

by rcolistete
Tue Jul 02, 2019 2:14 pm
Forum: Pyboard D-series
Topic: pyb.stop() / machine.lightsleep() time to wake up
Replies: 1
Views: 103

pyb.stop() / machine.lightsleep() time to wake up

One fantastic feature of Pyboard D is a very short time to wake up from lightsleep , which has very low current (170 uA) while retaining the RAM state. I've measured 344-404 us using the software : from pyb import RTC rtc = RTC() rtc.datetime((2019, 6, 30, 7, 17, 23, 30, 0)) t1 = rtc.datetime() rtc...
by rcolistete
Mon Jul 01, 2019 2:06 pm
Forum: Pyboard D-series
Topic: Power usage on Pyboard D
Replies: 5
Views: 278

Re: Power usage on Pyboard D

Reserved.
by rcolistete
Mon Jul 01, 2019 2:05 pm
Forum: Pyboard D-series
Topic: Power usage on Pyboard D
Replies: 5
Views: 278

Re: Power usage on Pyboard D

Reserved.
by rcolistete
Mon Jul 01, 2019 2:04 pm
Forum: Pyboard D-series
Topic: Power usage on Pyboard D
Replies: 5
Views: 278

Re: Power usage on Pyboard D

WiFi power usage. Pyboard D SF2W with USB cable, REPL idle, MicroPython v1.10-445-ga9b1d3ca3 on 2019-05-29, USB at 5.08V : - WiFi AP active, no connections, increases the electric current 43-46 mA. Notice after "ap.active(False)" the electric current doesn't come back to the values before WiFi AP ac...
by rcolistete
Thu Jun 27, 2019 3:24 pm
Forum: Pyboard D-series
Topic: Low power support on Pyboard D : pyb.wfi, pyb.stop, pyb.standby(), etc
Replies: 1
Views: 86

Low power support on Pyboard D : pyb.wfi, pyb.stop, pyb.standby(), etc

Is there to Pyboard D any equivalent of script "lowpower.py" from Pyboard 1.1 :
https://gist.github.com/dpgeorge/bf477eb883b6d189eae9
from topic "low power support?" ?

Is "pyb.wfi()" working on Pyboard D ? Some tests don't show any difference in power usage.
by rcolistete
Thu Jun 27, 2019 2:02 pm
Forum: Pyboard D-series
Topic: Power usage on Pyboard D
Replies: 5
Views: 278

Re: Power usage on Pyboard D

Pyboard D SF6W with USB cable, REPL idle, MicroPython v1.10-445-ga9b1d3ca3 on 2019-05-29, USB at 5.08V : - 50.3 mA @ 216 MHz; - 39.3 mA @ 168 MHz; - 31.0 mA @ 144 MHz (default); - 27.4 mA @ 120 MHz; - 23.3 mA @ 96 MHz; - 19.4 mA @ 72 MHz; - 15.3 mA @ 48 MHz; - 13.5 mA @ 36 MHz; - 11.2 mA @ 24 MHz (R...
by rcolistete
Thu Jun 27, 2019 12:16 pm
Forum: MicroPython pyboard
Topic: ADC measure negative voltage??
Replies: 23
Views: 606

Re: ADC measure negative voltage??

Taking a large number or readings and averaging them will help. 4 readings should give about one more bit, 16 readings about two more bits noise free. It is called ADC oversampling. Some tutorials/references : IMPROVING ADC RESOLUTION BY OVERSAMPLING AND AVERAGING AVR121: Enhancing ADC resolution b...
by rcolistete
Sun Jun 23, 2019 3:25 pm
Forum: Programs, Libraries and Tools
Topic: [SOLVED] question on mpy-cross
Replies: 21
Views: 817

Re: [SOLVED] question on mpy-cross

Thanks for updating "mpy-cross_pycom.exe" and "mpy-cross_pycom_linux" !
by rcolistete
Sat Jun 08, 2019 4:01 pm
Forum: Pyboard D-series
Topic: Power usage on Pyboard D
Replies: 5
Views: 278

Re: Power usage on Pyboard D

Pyboard D SF2W with USB cable, MicroPython v1.10-445-ga9b1d3ca3 on 2019-05-29, USB at 5.08V : - REPL idle : * 47.1 mA @ 216 MHz; * 36.1 mA @ 168 MHz; * 28.6 mA @ 144 MHz; * 24.8 mA @ 120 MHz (default); * 20.9 mA @ 96 MHz; * 17.7 mA @ 72 MHz; * 13.8 mA @ 48 MHz; * 12.1 mA @ 36 MHz; * 10.2 mA @ 24 MHz...
by rcolistete
Sat Jun 08, 2019 1:34 pm
Forum: Pyboard D-series
Topic: Power usage on Pyboard D
Replies: 5
Views: 278

Power usage on Pyboard D

Topic do list power usage tests on Pyboard D in many configurations : - SF2W, SF3W, SF6W; - calculations loop, idle, (light) sleep, deep sleep; - different frequencies (120 MHz, etc); - different power inputs (USB, Vin, etc); - WiFi on/off, Bluetooth on/off, STA/AP modes, etc; - LED turned on/off; -...