Controlling 6 Temperature Sensors - Is this Possible?

Using Arduino Sensors
1

Is it possible to run the following from one Arduino and have it connect to my wireless router 5.0ghz wireless (or 2.4ghz)?

4x MAX31865, - PT100 RTD temp sensors
1x MAX31856 - K type temp sensor
1x BME280 - Environment sensor

I was looking at an ESP32 but I think I would have to have one per sensor. Is there a simpler way?

Thanks in advance for the advice!

2

You can run all of them on one Arduino. One of the ESP devices would probably be better as they generally have WiFi built in. Put together a simple annotated schematic and we will take a look and let you know.

3

Thank you for the reply. I have been trying to figure this out with no luck.

Can someone please tell me how to wire this up?

MAX31865 -> ESP32-WROOM-32
VIN -> VIN
GND -> GND
3V3 -> [N/A]?
CLK -> PIN 35??? SCK GPIO18 V_SPI_CLK ???
SDO -> 
SDI -> 
CS  -> PIN22 ???  CS GPIO2 ADC2_2 HSPI_WP Touch2
RDY ->

image
image758×468 89.6 KB

image
image502×556 59.8 KB

4

Check the supplier they have that information on their website.

5

I bought it on amazon. When I google ESP-WROOM-32 I come up with this link ESP32 DevKit ESP32-WROOM GPIO Pinout | Circuits4you.com

I am unsure where to connect pins CLK, SDO, SDI, and CS on the ESP32

6

have a look at ESP32 pin usage
looks like the MAX31865 and MAX31856 use SPI - each would require a seperate CS chip select pin
BME280 could use I2C?
do a web search for MAX31865 arduino - should give you example code

7

Thank you for the response. So when I look at this image

image
image750×538 124 KB

I see GPIO15 - HSPI CS0
and I also see
GPIO5 - VSPI CS0

What is the difference between HSPI and VSPI?

8

have a look at ESP32 SPI Communication

9

This topic was automatically closed 180 days after the last reply. New replies are no longer allowed.