Notice. New forum software under development. It's going to miss a few functions and look a bit ugly for a while, but I'm working on it full time now as the old forum was too unstable. Couple days, all good. If you notice any issues, please contact me.
andreas Senior Member Joined: 07/12/2020 Location: GermanyPosts: 226
Posted: 06:28pm 17 Aug 2022
Copy link to clipboard
Print this post
Hello,
today I took some parts: pico w, RTC module, SD-Card Module, DiP Pi Power Master, some distance holders, glue and created this mini computer.
It is certainly the smallest I ever made :-)
The "mini" can store data and programs on the SD-Card, It has date & time for logging measurements, it can be received by WLAN when using MicroPython, it has an UPS with 10000 mAh akku and a power management with DC input 6-18 volts and has a size of a matchbox.
I tested the SD-Card with an Raspberry Pi 4 Card and listed the files using Picomite "files" and the "list" commands.
regards -andreas Edited 2022-08-18 04:47 by andreas
Nimue Guru Joined: 06/08/2020 Location: United KingdomPosts: 420
Posted: 09:04pm 17 Aug 2022
Copy link to clipboard
Print this post
Looks good.
Is that a Pico W? I thought MMBasic didnt run on that flavour? Or is that why you say "it can be received by WLAN when using MicroPython"?
Not seen that before, but the DiP-Pi PIoT version with WiFi etc looks interesting.
NEntropy is not what it used to be
andreas Senior Member Joined: 07/12/2020 Location: GermanyPosts: 226
Posted: 05:39am 18 Aug 2022
Copy link to clipboard
Print this post
Yes, PicoMite Version 5.070515. And yes, WLAN is not supported by PicoMite. Switching the "operating system" is a matter of seconds. When wireless is required - there is MicroPython
-andreas
andreas Senior Member Joined: 07/12/2020 Location: GermanyPosts: 226
Posted: 05:58am 18 Aug 2022
Copy link to clipboard
Print this post
After connecting the Dip-Pi Power Master, I used the first 7 Pins of the Pico W to connect the two external devices (SD-Card, RTC). They are listed as "free" or not used by the power master itself.
andreas Senior Member Joined: 07/12/2020 Location: GermanyPosts: 226
Posted: 06:55am 18 Aug 2022
Copy link to clipboard
Print this post
Here is a PicoMite program to test the "mini". It was run with only the akku connected. No external power source, no USB cable.
It logs: VBAT, EPWR and VSYS.
When connecting a solar panel EPWR will show somting like 16-19 volts and charging the battery. But this morning the 3.7V battery was charged fully to 4.22 volts.
The output of this program:
What I don't understand is the oscillating value of VSYS when using a pico w? Every second value shows VSYS the other value is near zero volts.
-andreas Edited 2022-08-18 17:00 by andreas
andreas Senior Member Joined: 07/12/2020 Location: GermanyPosts: 226
Posted: 07:09am 18 Aug 2022
Copy link to clipboard
Print this post
Update with time&date logging:
'Option DISPLAY 50,100 'Option COLOURCODE on
Dim m26 As float = 0.0 ' running mean of VBAT Dim m27 As float = 0.0 ' running mean of EPWR Dim m29 As float = 0.0 ' running mean of VSYS
Dim n26 As integer = 0 ' number ob values counted within running mean Dim n27 As integer = 0 Dim n29 As integer = 0
Const length = 10
Dim fname$ = Right$(Str$(Epoch(now)),8)+".txt" ' generic filename
Notice. New forum software under development. It's going to miss a few functions and look a bit ugly for a while, but I'm working on it full time now as the old forum was too unstable. Couple days, all good. If you notice any issues, please contact me.
Print this post
