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Forum Index : Microcontroller and PC projects : Pico Computer 3 hardware profiler

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ebbandflow
Regular Member

Joined: 31/08/2023
Location: United States
Posts: 55
Posted: 11:17pm 08 Aug 2026
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Recently a backshed member sent me one of their preassembled Pico Computer 3 boards complete with end plates, case, and wifi chip ready to solder on. It looks very nice. Hats off to toml_12953 for the board and Peter for the design!

I have been quite busy as life has changed recently, but yesterday I had the chance to solder on the wifi chip to the board and then prompted claude to create a profile.bas program - to test out the available hardware and ensure my hand soldering job was up to spec. It runs through the system hardware, offering reports on each and saving a log file at the end.

In case this may be of use to anyone else testing their new boards, I figured I;d share. Attached are the .bas program & readme.md files (compressed in a .zip file) and below is an example of the output:

PicoComputer3_profiler.zip


======================================================================
 PICO COMPUTER 3 -- SYSTEM PROFILER
 08-08-2026  12:52:56
======================================================================

----------------------------------------------------------------------
 1. IDENTITY
----------------------------------------------------------------------
   Firmware                : MMBasic 6.0301
   Device family           : WebMite RP2350B
   Firmware image          : PicoMiteHDMIUSBWEB  (derived)
   Platform option         : PICO COMPUTER 3
   Chip unique ID          : 4D10316496A
   Last boot cause         : Reset Switch
   CPU clock               : 315.0 MHz
   Uptime                  : 832.1 s
   MMBasic date/time       : 08-08-2026 12:52:57
 [INFO] CPU clock              315 MHz, set by the 640x480 HDMI mode (normal)

----------------------------------------------------------------------
 2. MEMORY
----------------------------------------------------------------------
   Free heap (PSRAM)       : 6.12 MB
   Flash drive size        : 13.43 MB
   Flash drive free        : 13.38 MB

 MEMORY command output:

Program:
 36K (24%) Program (1148 lines)
108K (76%) Free

Saved Variables:
 16K (100%) Free

RAM:
 11K ( 0%) 10 Variables
  2K ( 0%) General
6321K (100%) Free

----------------------------------------------------------------------
 3. PSRAM  (heap integrity + bandwidth)
----------------------------------------------------------------------
   Heap before test        : 6.13 MB
 [PASS] PSRAM alloc            5.21 MB single array (682692 x 64-bit)
   Heap during test        : 937.7 KB
 [PASS] PSRAM sweep            every 512B block over 5.21 MB verified
 [PASS] PSRAM pattern          256 KB dense read/write/verify clean
   MEMORY COPY rate        : 6.1 MB/s (16 MB copied in 2631 ms)
   Heap after ERASE        : 6.12 MB
 [PASS] Heap recovery          heap fully reclaimed

----------------------------------------------------------------------
 4. INTERNAL FLASH FILE SYSTEM  (A:)
----------------------------------------------------------------------
   Volume size             : 13.43 MB
   Free space              : 13.38 MB
 [PASS] Flash read/write       64 KB written and verified byte-exact
   Write throughput        : 65.1 KB/s
   Read throughput         : 419.6 KB/s

----------------------------------------------------------------------
 5. SD CARD  (B:)
----------------------------------------------------------------------
   Controller pins         : CS GP33  CLK GP30  MOSI GP31  MISO GP28
   Status                  : Ready
 [PASS] SD read/write          64 KB written and verified
   Write throughput        : 332.9 KB/s
   Card size               : 7.39 GB
   Card free               : 7.37 GB

----------------------------------------------------------------------
 6. SYSTEM I2C BUS SCAN  (SDA GP20 / SCL GP21)
----------------------------------------------------------------------
   0x68  (104)   DS3231 real-time clock (on-board)
 [PASS] I2C bus                1 device(s) responding

----------------------------------------------------------------------
 7. DS3231 REAL-TIME CLOCK  (I2C 0x68)
----------------------------------------------------------------------
 [PASS] RTC present            DS3231 acknowledges at 0x68
   RTC time                : 12:53:04
   RTC date                : 08-08-2026
   MMBasic time            : 12:53:04
 [PASS] RTC oscillator         seconds register advancing normally
   Status register 0x0F    : 0x08
   Control register 0x0E   : 0x1C
 [PASS] RTC oscillator flag    OSF clear - time has been kept continuously
   32 kHz output           : enabled (register default)
   Die temperature         : 36.25 degC
 [PASS] Board temperature      36.2 degC at the RTC
 [PASS] RTC vs MMBasic         agree within 0 s

----------------------------------------------------------------------
 8. HDMI DISPLAY
----------------------------------------------------------------------
   Resolution              : 640 x 480
   Default font            : 1
   Foreground colour       : 0xFFFFFF
   Background colour       : 0x000000
   Framebuffer est.        : 600.0 KB
 [PASS] Display mode           640x480 active
   Line draw rate          : 4764 lines/s
   Filled box rate         : 5838 boxes/s
 [PASS] Graphics engine        line and filled-box primitives executed

----------------------------------------------------------------------
 9. I2S AUDIO  (BCLK GP10 / LRCK GP11 / DATA GP22)
----------------------------------------------------------------------
   Sound state while playing : TONE
 [PASS] Audio engine           tone generator ran (listen for the sweep)
   Note                    : audible output confirms the PCM5102 DAC; silence needs a scope on GP10/11/22

----------------------------------------------------------------------
 10. USB HOST  (hub channels 1-4, CDC 5-8)
----------------------------------------------------------------------
   Keyboard state          : Off
   HID devices             : 0 of 4 channels in use
 [INFO] USB host               no devices attached - expected when running headless

   Plug in a keyboard, mouse or gamepad and re-run to see it
   enumerated here with its VID/PID.

----------------------------------------------------------------------
 11. GPIO ALLOCATION MAP  (GP0 - GP47)
----------------------------------------------------------------------
   GP8   (pin 11)  Boot Reserved : CONSOLE TX
   GP9   (pin 12)  Boot Reserved : CONSOLE RX
   GP10  (pin 14)  Boot Reserved : I2S BCLK
   GP11  (pin 15)  Boot Reserved : I2S LRCK
   GP12  (pin 16)  Boot Reserved : HDMI
   GP13  (pin 17)  Boot Reserved : HDMI
   GP14  (pin 19)  Boot Reserved : HDMI
   GP15  (pin 20)  Boot Reserved : HDMI
   GP16  (pin 21)  Boot Reserved : HDMI
   GP17  (pin 22)  Boot Reserved : HDMI
   GP18  (pin 24)  Boot Reserved : HDMI
   GP19  (pin 25)  Boot Reserved : HDMI
   GP20  (pin 26)  Boot Reserved : SYSTEM I2C SDA
   GP21  (pin 27)  Boot Reserved : SYSTEM I2C SCL
   GP22  (pin 29)  Boot Reserved : I2S DATA
   GP23  (pin 41)  Boot Reserved : CYW43
   GP24  (pin 42)  Boot Reserved : CYW43
   GP25  (pin 43)  Boot Reserved : CYW43
   GP28  (pin 34)  Boot Reserved : SD MISO
   GP29  (pin 44)  Boot Reserved : CYW43
   GP30  (pin 45)  Boot Reserved : SD CLK
   GP31  (pin 46)  Boot Reserved : SD MOSI
   GP33  (pin 48)  Boot Reserved : SD CS
   GP47  (pin 62)  Boot Reserved : PSRAM CS

   Pins allocated          : 24 of 48
   Pins free               : 24

   Unallocated: GP0 GP1 GP2 GP3 GP4 GP5 GP6 GP7 GP26 GP27 GP32 GP34 GP35 GP36 GP37 GP38 GP39 GP40 GP41 GP42 GP43 GP44 GP45 GP46
 [PASS] GPIO map               24 pins claimed by firmware options

----------------------------------------------------------------------
 12. CPU BENCHMARKS
----------------------------------------------------------------------
   Integer add loop        : 108 k-iter/s (1859 ms / 200k)
   Float mul+add loop      : 79 k-iter/s (1270 ms / 100k)
   SIN+SQR loop            : 58.3 k-iter/s (343 ms / 20k)
   String build loop       : 56.8 k-iter/s (352 ms / 20k)
   Sieve (8190 x 10)       : 5413 ms, 1899 primes
 [PASS] Sieve correctness      1899 primes - arithmetic is sound

----------------------------------------------------------------------
 13. WIRELESS  (RM2 / CYW43439 module)
----------------------------------------------------------------------
   Running firmware        : WebMite RP2350B
 [PASS] WiFi stack             compiled into this firmware build
   IP address              : 192.168.86.24

   Scanning for access points...

Performing wifi scan
   Scan attempts needed    : 1
     homenet                          -63 dBm   ch 1
     (hidden)                         -80 dBm   ch 5
     Nope                             -77 dBm   ch 5
     Whit2.4_IoT                      -88 dBm   ch 7

 [PASS] RM2 radio              4 access point(s) found - the module works
   Strongest signal        : homenet at -63 dBm
   Scan payload            : 364 bytes
 [PASS] Antenna path           healthy signal levels (-63 dBm best)
 [PASS] Network join           DHCP lease held at 192.168.86.24

----------------------------------------------------------------------
 14. SUMMARY
----------------------------------------------------------------------
   Passed                  : 21
   Warnings                : 0
   Failures                : 0
   Skipped                 : 0

 No hard failures. Subsystems reachable from this firmware are healthy.

Log written to A:/PROFILE.LOG
 
ebbandflow
Regular Member

Joined: 31/08/2023
Location: United States
Posts: 55
Posted: 02:34am 09 Aug 2026
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I was finding the bottom of the case was fairly warm, and then stumbled across this post:
https://www.thebackshed.com/forum/ViewTopic.php?FID=16&TID=18919&LastEntry=Y#257894#257766

But after some minor brain surgery it's running cool now.  

 
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