Hi,
i have many esp32 who have a pt100 and a amplifier MAX31865.
My temperature works.
I want to migrate these esp to esphome but i have many errors.
There is the working fonction :
void pt100() {
Serial.write("TEMP");
int cs = 34;
int di = 35;
int doo = 32;
int clk = 33;
Adafruit_MAX31865 max = Adafruit_MAX31865(cs,di,doo,clk);
max.begin(MAX31865_2WIRE);
unsigned int rtd = max.readRTD();
float ratio = rtd;
ratio /= 32768;
float resistance = RREF*ratio;
float temp = max.temperature(RNOMINAL, RREF);
Serial.println(temp);
String tempstr = String(temp);
server.send(200, "text/plain", tempstr);
}
And the yaml of esphome who not works :
esphome:
name: chambre
friendly_name: Chambre
esp32:
board: esp32dev
framework:
type: arduino
# Enable logging
logger:
logs:
# Silence unrelated chatty components
api: DEBUG
api.connection: DEBUG
api.service: DEBUG
app: DEBUG
scheduler: DEBUG
sensor.filter: DEBUG
sensor: DEBUG
# Enable Home Assistant API
api:
encryption:
key: xxx
ota:
- platform: esphome
password: xxx
wifi:
ssid: !secret wifi_ssid
password: !secret wifi_password
# Enable fallback hotspot (captive portal) in case wifi connection fails
ap:
ssid: "Chambre Fallback Hotspot"
password: xxx
captive_portal:
# Example configuration entry
spi:
miso_pin: 33
mosi_pin: 25
clk_pin: 26
sensor:
- platform: max31865
name: "Chambre Temperature"
cs_pin: 32
reference_resistance: 430 Ω
rtd_nominal_resistance: 100 Ω
rtd_wires: 2
There is the logs of esphome :
[18:59:18][W][max31865:018]: Overvoltage/undervoltage fault between measurements
[18:59:18][W][max31865:021]: RTDIN- < 0.85 x V_BIAS (FORCE- open) between measurements
[18:59:18][W][max31865:024]: REFIN- < 0.85 x V_BIAS (FORCE- open) between measurements
[18:59:18][W][max31865:027]: REFIN- > 0.85 x V_BIAS between measurements
[18:59:18][W][max31865:031]: RTD Low Threshold between measurements
[18:59:18][W][max31865:034]: RTD High Threshold between measurements
[18:59:18][E][max31865:051]: Fault detection incomplete (0xFF) after 6007μs (datasheet spec is 600μs max)! Aborting read.
[18:59:18][D][sensor:094]: 'Chambre Temperature': Sending state nan °C with 2 decimals of accuracy
[18:59:18][W][component:237]: Component max31865.sensor took a long time for an operation (62 ms).
[18:59:18][W][component:238]: Components should block for at most 30 ms.
If anyone have an idea
Thank you !
