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Green rectangular circuit board with gold edge connectors and black sensor chip, labeled MAX31865 V2.0

SMUGDESK

SMUGDESK MAX31865 V2.0 RTD Temperature Sensor Module PT100 PT1000

SKU CH-ADR4-RE2JV

RTD-to-digital converter module for PT100 and PT1000 probes with SPI output, compatible with SKR V1.4 and SKR 2 mainboards

  • High-precision temperature acquisition via MAX31865 chip
  • Supports PT100 and PT1000 platinum resistance probes
  • SPI communication ensures stable, noise-resistant data transfer
  • Direct plug-and-play with SKR V1.4 and SKR 2 boards
  • Overvoltage and reverse-connection protection for safe operation

Target Use

The SMUGDESK MAX31865 V2.0 module converts PT100 and PT1000 platinum resistance sensors into digital readings for 3D printer hot ends and heated beds. It suits builders who need tighter temperature control than standard thermistors provide.

SPI Interface Limits

Communication relies on a standard SPI bus, so the host controller must supply a compatible SPI peripheral and firmware support. Cable length and electrical noise in the printer enclosure can degrade signal integrity if routing is not kept short and clear of stepper wiring.

Installation Notes

The board plugs directly into BIGTREETECH SKR V1.4 and SKR 2 motherboards, requiring only firmware parameter changes to activate. Miswiring the sensor leads or applying voltage beyond the rated supply can still damage the module despite on‑board overvoltage protection.

Highlights

  • High-precision temperature acquisition via MAX31865 chip
  • Supports PT100 and PT1000 platinum resistance probes
  • SPI communication ensures stable, noise-resistant data transfer
  • Direct plug-and-play with SKR V1.4 and SKR 2 boards
  • Overvoltage and reverse-connection protection for safe operation

Specifications

No published specifications for this item yet.

Questions about this item

Should I use a PT100 or PT1000 probe with the MAX31865 V2.0 module?

Both probe types are supported directly; choose PT100 for standard industrial compatibility or PT1000 when longer wiring runs or higher base resistance are preferred.

How much more accurate is the MAX31865 chip compared with a standard thermistor on a 3D printer hot end?

The dedicated RTD conversion chip turns tiny resistance changes into digital values with far higher measuring accuracy, eliminating the temperature deviation that causes print defects.

What does the SPI interface limit in practice when connected to an SKR V1.4 or SKR 2 board?

SPI provides fast response and strong electromagnetic interference resistance in the printer's electrical environment, with no practical throughput bottleneck for temperature sampling.

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