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2026-02-25T11:01:50Z

Created page with "{| style="width:50%" |- | width="20%" style="color:gray;" | Author | Matrix TSL |- | width="20%" style="color:gray;" | Version | 1.0 |- | width="20%" style="color:gray..."

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{| style="width:50%"
|-
| width="20%" style="color:gray;" | Author
| Matrix TSL
|-
| width="20%" style="color:gray;" | Version
| 1.0
|-
| width="20%" style="color:gray;" | Category
| Environmental
|}

==RTD (MAX31865) component==
Component to interface the MAX31865 RTD-to-digital converter IC. Uses a standard SPI interface to connect to the IC and measure RTD resistance / temperature. Compatible with PT100 and PT1000 temperature sensors.

==Version information==

Library Version, Component Version, Date, Author, Info
1, 1.0, 23-12-24, BR, Initial MAX31865 RTD component implementation

==Detailed description==

''No detailed description exists yet for this component''

==Examples==

''<span style="color:red;">No additional examples</span>''

==Macro reference==

===AutoConvert===
{| class="wikitable" style="width:60%; background-color:#FFFFFF;"
|-
| width="10%" align="center" style="background-color:#D8C9D8;" align="center" | [[File:Fc9-comp-macro.png]]
| width="90%" style="background-color:#D8C9D8; color:#4B008D;" | '''AutoConvert'''
|-
| colspan="2" | Enables or disables automatic continuous conversion. 
|-
|-
| width="10%" align="center" | [[File:Fc9-u8-icon.png]] - BYTE
| width="90%" | Enable
|-
| colspan="2" | 0 = One-shot, 1 = Continuous 
|-
| width="10%" align="center" style="border-top: 2px solid #000;" | [[File:Fc9-void-icon.png]] - VOID
| width="90%" style="border-top: 2px solid #000;" | ''Return''
|}

===ClearFault===
{| class="wikitable" style="width:60%; background-color:#FFFFFF;"
|-
| width="10%" align="center" style="background-color:#D8C9D8;" align="center" | [[File:Fc9-comp-macro.png]]
| width="90%" style="background-color:#D8C9D8; color:#4B008D;" | '''ClearFault'''
|-
| colspan="2" | Clears any latched fault flags in the MAX31865. 
|-
|-
| width="10%" align="center" style="border-top: 2px solid #000;" | [[File:Fc9-void-icon.png]] - VOID
| width="90%" style="border-top: 2px solid #000;" | ''Return''
|}

===EnableBias===
{| class="wikitable" style="width:60%; background-color:#FFFFFF;"
|-
| width="10%" align="center" style="background-color:#D8C9D8;" align="center" | [[File:Fc9-comp-macro.png]]
| width="90%" style="background-color:#D8C9D8; color:#4B008D;" | '''EnableBias'''
|-
| colspan="2" | Enables or disables the MAX31865 bias current. 
|-
|-
| width="10%" align="center" | [[File:Fc9-u8-icon.png]] - BYTE
| width="90%" | Enable
|-
| colspan="2" | 0 = Off, 1 = On 
|-
| width="10%" align="center" style="border-top: 2px solid #000;" | [[File:Fc9-void-icon.png]] - VOID
| width="90%" style="border-top: 2px solid #000;" | ''Return''
|}

===Initialise===
{| class="wikitable" style="width:60%; background-color:#FFFFFF;"
|-
| width="10%" align="center" style="background-color:#D8C9D8;" align="center" | [[File:Fc9-comp-macro.png]]
| width="90%" style="background-color:#D8C9D8; color:#4B008D;" | '''Initialise'''
|-
| colspan="2" | Initialises the SPI bus and basic MAX31865 configuration. 
|-
|-
| width="10%" align="center" style="border-top: 2px solid #000;" | [[File:Fc9-void-icon.png]] - VOID
| width="90%" style="border-top: 2px solid #000;" | ''Return''
|}

===ReadFault===
{| class="wikitable" style="width:60%; background-color:#FFFFFF;"
|-
| width="10%" align="center" style="background-color:#D8C9D8;" align="center" | [[File:Fc9-comp-macro.png]]
| width="90%" style="background-color:#D8C9D8; color:#4B008D;" | '''ReadFault'''
|-
| colspan="2" | Reads the MAX31865 fault status register. 
|-
|-
| width="10%" align="center" style="border-top: 2px solid #000;" | [[File:Fc9-u8-icon.png]] - BYTE
| width="90%" style="border-top: 2px solid #000;" | ''Return''
|}

===ReadTemperature===
{| class="wikitable" style="width:60%; background-color:#FFFFFF;"
|-
| width="10%" align="center" style="background-color:#D8C9D8;" align="center" | [[File:Fc9-comp-macro.png]]
| width="90%" style="background-color:#D8C9D8; color:#4B008D;" | '''ReadTemperature'''
|-
| colspan="2" | Performs a sample and returns temperature in Degrees C. 
|-
|-
| width="10%" align="center" style="border-top: 2px solid #000;" | [[File:Fc9-f32-icon.png]] - FLOAT
| width="90%" style="border-top: 2px solid #000;" | ''Return''
|}

===Sample===
{| class="wikitable" style="width:60%; background-color:#FFFFFF;"
|-
| width="10%" align="center" style="background-color:#D8C9D8;" align="center" | [[File:Fc9-comp-macro.png]]
| width="90%" style="background-color:#D8C9D8; color:#4B008D;" | '''Sample'''
|-
| colspan="2" | Performs a single MAX31865 conversion and returns the raw sensor reading. 
|-
|-
| width="10%" align="center" style="border-top: 2px solid #000;" | [[File:Fc9-u16-icon.png]] - UINT
| width="90%" style="border-top: 2px solid #000;" | ''Return''
|}

===SetNotchFilter===
{| class="wikitable" style="width:60%; background-color:#FFFFFF;"
|-
| width="10%" align="center" style="background-color:#D8C9D8;" align="center" | [[File:Fc9-comp-macro.png]]
| width="90%" style="background-color:#D8C9D8; color:#4B008D;" | '''SetNotchFilter'''
|-
| colspan="2" | Sets the notch filter to 50Hz (1) or 60Hz (0). 
|-
|-
| width="10%" align="center" | [[File:Fc9-u8-icon.png]] - BYTE
| width="90%" | Mode
|-
| colspan="2" | 0 = 50Hz, 1 = 60Hz 
|-
| width="10%" align="center" style="border-top: 2px solid #000;" | [[File:Fc9-void-icon.png]] - VOID
| width="90%" style="border-top: 2px solid #000;" | ''Return''
|}

===SetWires===
{| class="wikitable" style="width:60%; background-color:#FFFFFF;"
|-
| width="10%" align="center" style="background-color:#D8C9D8;" align="center" | [[File:Fc9-comp-macro.png]]
| width="90%" style="background-color:#D8C9D8; color:#4B008D;" | '''SetWires'''
|-
| colspan="2" | Sets the RTD wiring mode (2/3/4-wire). 
|-
|-
| width="10%" align="center" | [[File:Fc9-u8-icon.png]] - BYTE
| width="90%" | Wires
|-
| colspan="2" | 2, 3 or 4 wires 
|-
| width="10%" align="center" style="border-top: 2px solid #000;" | [[File:Fc9-void-icon.png]] - VOID
| width="90%" style="border-top: 2px solid #000;" | ''Return''
|}

==Property reference==

{| class="wikitable" style="width:60%; background-color:#FFFFFF;"
|-
| width="10%" align="center" style="background-color:#D8C9D8;" | [[File:Fc9-prop-icon.png]]
| width="90%" style="background-color:#D8C9D8; color:#4B008D;" | '''Properties'''
|-
|-
| width="10%" align="center" style="background-color:#EAE1EA;" | [[File:Fc9-conn-icon.png]]
| width="90%" style="background-color:#EAE1EA; color:#4B008D;" | RTD Properties
|-
|-
| width="10%" align="center" | [[File:Fc9-type-16-icon.png]]
| width="90%" | RTD Type
|-
| colspan="2" | Selects the RTD type used with the MAX31865. 
|-
| width="10%" align="center" | [[File:Fc9-type-14-icon.png]]
| width="90%" | Reference Resistor (Ohms)
|-
| colspan="2" | Reference resistor value used on the MAX31865 breakout (default 430 Ohms). 
|-
| width="10%" align="center" | [[File:Fc9-type-16-icon.png]]
| width="90%" | Notch Filter
|-
| colspan="2" |  
|-
| width="10%" align="center" | [[File:Fc9-type-7-icon.png]]
| width="90%" | Bias Current
|-
| colspan="2" |  
|-
| width="10%" align="center" | [[File:Fc9-type-7-icon.png]]
| width="90%" | Auto Convert
|-
| colspan="2" |  
|-
| width="10%" align="center" | [[File:Fc9-type-16-icon.png]]
| width="90%" | RTD Wiring Mode
|-
| colspan="2" |  
|-
| width="10%" align="center" style="background-color:#EAE1EA;" | [[File:Fc9-conn-icon.png]]
| width="90%" style="background-color:#EAE1EA; color:#4B008D;" | SPI Properties
|-
|-
| width="10%" align="center" | [[File:Fc9-type-16-icon.png]]
| width="90%" | Channel
|-
| colspan="2" | SPI Channel selector 
|-
| width="10%" align="center" | [[File:Fc9-type-16-icon.png]]
| width="90%" | Prescale
|-
| colspan="2" | Prescale option selector 
|-
| width="10%" align="center" | [[File:Fc9-type-5-icon.png]]
| width="90%" | MOSI
|-
| colspan="2" | SPI Data Out pin (MOSI). 
|-
| width="10%" align="center" | [[File:Fc9-type-5-icon.png]]
| width="90%" | MISO
|-
| colspan="2" | SPI Data In pin (MISO). 
|-
| width="10%" align="center" | [[File:Fc9-type-5-icon.png]]
| width="90%" | CLK
|-
| colspan="2" | SPI Clock pin (SCK). 
|-
| width="10%" align="center" | [[File:Fc9-type-5-icon.png]]
| width="90%" | CS / SS
|-
| colspan="2" | Chip Select / Slave Select pin used to enable the MAX31865. 
|}

==Component Source Code==

Please click here to download the component source project: [https://www.flowcode.co.uk/wiki/componentsource/FC_Comp_Source_ThermocoupleMAX31865.fcfx FC_Comp_Source_ThermocoupleMAX31865.fcfx]

Please click here to view the component source code (Beta): [https://www.flowcode.co.uk/FlowchartView/?wfile=componentsource/FC_Comp_Source_ThermocoupleMAX31865.fcfx FC_Comp_Source_ThermocoupleMAX31865.fcfx]

Component: RTD (MAX31865) (Environmental) - Revision history

Wiki bot: Created page with "{| style="width:50%" |- | width="20%" style="color:gray;" | Author | Matrix TSL |- | width="20%" style="color:gray;" | Version | 1.0 |- | width="20%" style="color:gray..."