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smart coffee temp probe

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(@kossmo)
Posts: 2
New Member
Topic starter
 
[#81505]

hello, im trying to use a marzocco e.1.005 temp probe on a 2 boiler system. the display reads 32f and does not change with water temp. ive uploaded new versions to 1.1 to both master and slave boards. also verified change in resistance at the green connector temp2 rtd- rtd+ . Not sure where to trouble shoot further. what pins on the esp32 correspond with rtd+/- temp2, maybe there is a bad trace on the board

jumpers are placed correctly according to the document


 
Posted : 06/05/2026 1:15 am
(@amontodd)
Posts: 1
Member Admin
 

Hello, apparently the marzocco e.1.005 probe is a PT1000 style sensor. So it should be compatible. The ESP32 doesn't see the temp probes directly. The temp probes interface with the MAX31865 IC and then the data is passed to the ESP32. 

Here is how I'd troubleshoot the issue

If you have a spare PT100 or PT1000 probe, try connecting it to the SM board.

Check the jumpers are correctly configured for the type of probe you are using.

Check the temp probe is enabled in the software.

If you have tried all of the above, you can return the board to me for inspection. If it is a faulty board from the factory, then I will send a replacement.


 
Posted : 06/05/2026 8:44 pm
(@kossmo)
Posts: 2
New Member
Topic starter
 

temp probes confirmed working on another machine, dual boiler setup both with e.1.005 pt1000 sensors. boiler 1 wont read temp, only psi. boiler 2 value never changes from 32f, saturated boiler at 74f ambient. currently using software 1.1, freshly installed in both master and slave

PXL 20260628 172755628.MP2
PXL 20260628 172623616.MP2
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Posted : 28/06/2026 5:44 pm
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