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Forum Index : Microcontroller and PC projects : tempr not working

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lizby
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Joined: 17/05/2016
Location: United States
Posts: 3757
Posted: 03:03pm 20 May 2026
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With the latest version, ?tempr isn't working for me on an RP2350-Zero. I reflashed V6.00.01 and it worked; flashed again immediately with V6.03.00RC9 and it returns 1000. It does this on all the pins I have tried.

PicoMite MMBasic RP2350A Edition V6.00.01
Copyright 2011-2024 Geoff Graham
Copyright 2016-2024 Peter Mather

> ?tempr(gp29)
25
PicoMite MMBasic RP2350A V6.03.00RC9
Copyright 2011-2026 Geoff Graham
Copyright 2016-2026 Peter Mather

Formatting the A: drive
> ?tempr(gp29)
1000
>


~
Edited 2026-05-21 01:04 by lizby
PicoMite, Armmite F4, SensorKits, MMBasic Hardware, Games, etc. on FOTS
 
matherp
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Joined: 11/12/2012
Location: United Kingdom
Posts: 11343
Posted: 03:25pm 20 May 2026
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Haven't got a ds18b20 with me so can't really look at it for the next couple of weeks. Can you find in which version it first stopped working then I might have a chance.
 
lizby
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Joined: 17/05/2016
Location: United States
Posts: 3757
Posted: 03:59pm 20 May 2026
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It fails at RP2350A V6.01.00

PicoMite MMBasic RP2350A V6.01.00
Copyright 2011-2025 Geoff Graham
Copyright 2016-2025 Peter Mather

Formatting the A: drive
> ?tempr(gp29)
1000


I don't have anything between RP2350A V6.00.01 and V6.01.00, and Geoff's archive doesn't contain and V6 versions. (Unfortunately, V6.00.01 doesn't contain trim$--I'll cobble a version.)
PicoMite, Armmite F4, SensorKits, MMBasic Hardware, Games, etc. on FOTS
 
matherp
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Joined: 11/12/2012
Location: United Kingdom
Posts: 11343
Posted: 04:31pm 20 May 2026
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What about 6.02.01 on Geoff's site?
 
mozzie
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Joined: 15/06/2020
Location: Australia
Posts: 323
Posted: 05:00pm 20 May 2026
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G'day Lizby,
Have you tried other pins? Works here on GP0 / GP28 on RP2350A V6.03.00RC9

> option list
PicoMite MMBasic RP2350A V6.03.00RC9
OPTION SYSTEM SPI GP18,GP19,GP16
OPTION FLASH SIZE 4194304
OPTION COLOURCODE ON
OPTION CPUSPEED (KHz) 200000
OPTION LCDPANEL ST7796S, LANDSCAPE,GP14,GP13,GP12
OPTION GUI CONTROLS 64
OPTION TOUCH GP15,GP17
GUI CALIBRATE 0, 3978, 3840, -1298, -868
> ? tempr(gp0)
26.25
> ? tempr(gp28)
26
>


This is on a RPI Pico2 so no access to GP29

Regards, Lyle.

Edit: Just re-read your original post and it appears you have tried other pins  
Edited 2026-05-21 03:03 by mozzie
 
Mixtel90

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Joined: 05/10/2019
Location: United Kingdom
Posts: 8839
Posted: 05:25pm 20 May 2026
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Unless MMBasic does something clever GP29 isn't an ADC input on a RP2350A or B.
Mick

Zilog Inside! nascom.info for Nascom & Gemini
Preliminary MMBasic docs & my PCB designs
 
lizby
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Joined: 17/05/2016
Location: United States
Posts: 3757
Posted: 05:45pm 20 May 2026
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PicoMite MMBasic RP2350A V6.03.00RC9
Copyright 2011-2026 Geoff Graham
Copyright 2016-2026 Peter Mather

> ?tempr(GP5)
1000
> ?tempr(GP0)
1000
> option list
PicoMite MMBasic RP2350A V6.03.00RC9
OPTION FLASH SIZE 4194304
OPTION COLOURCODE ON
OPTION CPUSPEED (KHz) 340000
> ?tempr(GP0)
1000
> ?tempr(GP1)
1000
> update firmware
PicoMite MMBasic RP2350A Edition V6.00.01
Copyright 2011-2024 Geoff Graham
Copyright 2016-2024 Peter Mather

> ?tempr(gp1)
25
> update firmware
PicoMite MMBasic RP2350A V6.02.01
Copyright 2011-2026 Geoff Graham
Copyright 2016-2026 Peter Mather

Formatting the A: drive
> ?tempr(gp1)
1000
>


No go for me with RP2350A V6.02.01. I don't understand why RP2350A V6.03.00RC9 worked for Lyle but not for me.
PicoMite, Armmite F4, SensorKits, MMBasic Hardware, Games, etc. on FOTS
 
mozzie
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Joined: 15/06/2020
Location: Australia
Posts: 323
Posted: 05:46pm 20 May 2026
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G'day Lizby,
Managed to find the RP2350-Zero purchased by mistake, GP29 does work with the DS18B20:

> option list
PicoMite MMBasic RP2350A V6.03.00RC4
OPTION FLASH SIZE 4194304
OPTION COLOURCODE ON
OPTION CPUSPEED (KHz) 200000
OPTION DISPLAY 40, 80
> ? tempr(gp29)
25.25
>


This is using the "Normal Power" option as shown in the manual, I had a heap of trouble with the "Parasitic Power" system as it seems to be quite dependent on device quality. Maybe this is causing what you are seeing.

Might also be worth trying TEMPR START with a long timeout, I think this helped with slow sensors. Strange it worked on the older version though  

Mick, the DS18B20 uses the one wire protocol so will work on any pin, the TMP37 etc is perhaps what you have in mind?

Regards, Lyle.
Edited 2026-05-21 03:54 by mozzie
 
Mixtel90

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Joined: 05/10/2019
Location: United Kingdom
Posts: 8839
Posted: 06:16pm 20 May 2026
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Sorry, brain's gone...
I'm concentrating on aquarium stands at the moment, not electronics. It shows, doesn't it?  :)
Mick

Zilog Inside! nascom.info for Nascom & Gemini
Preliminary MMBasic docs & my PCB designs
 
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