I’ve recently started having an issue with an ESP32-based weather station I’ve had running for over 2 years now. The original ESP32 board failed and I stopped receiving values from my station, so I made the decision to completely rebuild the board because I already had most of the parts lying around in surplus. It is based on this project but adapted for esphome.
After rebuilding a new circuit board from scratch and flashing my code to a new esp32, I’m having an issue with almost every sensor returning nan.
Here is my esphome yaml:
esphome:
name: weatherstation-garden
platform: ESP32
board: esp32dev
#includes:
# - SI1145.h
#libraries:
# - "Adafruit SI1145 Library"
on_boot:
then:
- script.execute: consider_deep_sleep
substitutions:
loc: "Garden"
name: "Garden Weather Station"
wifi:
ssid: "xxxx"
password: !secret wifi_pw
fast_connect: false
manual_ip:
static_ip: xxx.xxx.xxx.xxx
gateway: xxx.xxx.xxx.xxx
subnet: xxx.xxx.xxx.xxx
ap:
ssid: ${name} Fallback
password: !secret fallback_pw
captive_portal:
logger:
#level: INFO
api:
encryption:
key: "xxxx"
ota:
password: !secret ota_pw
i2c:
sda: GPIO21
scl: GPIO22
scan: True
frequency: 100kHz
sensor:
# =========================================
# Temperature, humidity, pressure sensor
# =========================================
- platform: bme280_i2c
address: 0x76
update_interval: 5s
temperature:
name: ${loc} Temperature
id: bme280_temperature
oversampling: 16x
filters:
- sliding_window_moving_average:
window_size: 3
send_every: 3
send_first_at: 3
- lambda: return (x * (9.0/5.0) + 32.0) + id(temperature_calibration).state;
# Calibration:
# 3/10/22 - +1.7
unit_of_measurement: "°F"
pressure:
name: ${loc} Pressure
id: bme280_pressure
accuracy_decimals: 2
filters:
- sliding_window_moving_average:
window_size: 3
send_every: 3
send_first_at: 3
- lambda: return x + id(pressure_calibration).state;
# Calibration:
# 3/10/22 | -0.75
humidity:
name: ${loc} Humidity
filters:
- sliding_window_moving_average:
window_size: 3
send_every: 3
send_first_at: 3
- lambda: return x + id(humidity_calibration).state;
# =========================================
# Pressure template sensors
# =========================================
- platform: template
name: ${loc} Altitude
lambda: |-
const float STANDARD_SEA_LEVEL_PRESSURE = id(relative_pressure).state; // Current equivalent sea level pressure, in hPa
const float c_temperature = (id(bme280_temperature).state - 32.0) * (5.0 / 9.0); // Temp in C
return ((c_temperature + 273.15) / 0.0065) *
(powf((STANDARD_SEA_LEVEL_PRESSURE / id(bme280_pressure).state), 0.190234) - 1); // in meter
update_interval: 15s
icon: 'mdi:altimeter'
unit_of_measurement: 'm'
- platform: template
name: ${loc} Relative Pressure
id: relative_pressure
lambda: |-
const float STANDARD_ALTITUDE = 282; // Current altitude, in meters
const float c_temperature = (id(bme280_temperature).state - 32.0) * (5.0 / 9.0); // Temp in C
return id(bme280_pressure).state / powf(1 - ((0.0065 * STANDARD_ALTITUDE) /
(c_temperature + (0.0065 * STANDARD_ALTITUDE) + 273.15)), 5.257); // in hPa, multiply by 0.02953007 for inHg
accuracy_decimals: 2
update_interval: 15s
unit_of_measurement: 'hPa'
icon: 'mdi:gauge'
- platform: template
name: ${loc} Relative Pressure (US)
lambda: |-
const float STANDARD_ALTITUDE = 282; // Current altitude, in meters
const float c_temperature = (id(bme280_temperature).state - 32.0) * (5.0 / 9.0); // Temp in C
return (id(bme280_pressure).state / powf(1 - ((0.0065 * STANDARD_ALTITUDE) /
(c_temperature + (0.0065 * STANDARD_ALTITUDE) + 273.15)), 5.257)) * 0.02953007;
accuracy_decimals: 2
update_interval: 15s
unit_of_measurement: 'inHg'
icon: 'mdi:gauge'
# =========================================
# UV Sensor (Offline)
# =========================================
#- platform: custom
# lambda: |-
# auto UV_sensor = new SI1145_sensor();
# App.register_component(UV_sensor);
# return {UV_sensor->visible_sensor, UV_sensor->ir_sensor, UV_sensor->uvindex_sensor};
# sensors:
# - name: ${loc} Visible Light
# - name: ${loc} IR Light
# - name: ${loc} UV Index
# accuracy_decimals: 2
# =========================================
# Voltage monitoring
# =========================================
- platform: adc
pin: GPIO33
id: "VCC"
internal: true
attenuation: 11db
update_interval: 15s
filters:
# Calibration: +0.02
- lambda: return x + id(voltage_calibration).state;
- platform: template
name: ${loc} Battery Voltage
icon: 'mdi:lightning-bolt'
id: battery_voltage
unit_of_measurement: 'V'
accuracy_decimals: 2
update_interval: 15s
# Total Calibration: +0.05
# R1: 27000
# R2: 100000
# The below is the inverse of the voltage divider output voltage formula
lambda: |-
return ((id(VCC).state * 127000) / 100000);
on_value:
then:
- lambda: |-
using namespace std;
//ESP_LOGW("main","battery = [%f]",x );
static string voltage = to_string(id(battery_voltage).state);
//ESP_LOGW("main","string_voltage = [%f]",id(battery_voltage).state );
static string sleeptime = to_string((3.50-id(battery_voltage).state)*600+9);
//ESP_LOGW("main","string_sleeptime = [%f]",(3.50-id(battery_voltage).state)*600+9 );
if(x>3.49)
{
id(sleep_status).publish_state(9.25);
id(deep_sleep_1).set_sleep_duration(9.25*60000);
id(deep_sleep_1).setup();
}
else if(x<3.50)
{
id(sleep_status).publish_state((3.50-id(battery_voltage).state)*600+9);
id(deep_sleep_1).set_sleep_duration(((3.50-x)*600+9)*60000);
id(deep_sleep_1).setup();
}
- platform: template
name: ${loc} ADC Voltage
unit_of_measurement: 'V'
accuracy_decimals: 2
update_interval: 15s
lambda: |-
return id(VCC).state;
- platform: template
name: ${loc} Battery Level
unit_of_measurement: '%'
accuracy_decimals: 0
update_interval: 15s
lambda: |-
return (((id(VCC).state - 2.00) / 1.30) * 100.00);
- platform: adc
pin: GPIO32
attenuation: 11db
name: ${loc} Soil Moisture
update_interval: 5s
filters:
- lambda: |-
//ESP_LOGW("main","soil = [%f]",x );
if (x > 3.34) {
return 0;
} else if (x < 1.36) {
return 100;
} else {
return (3.34-x) / (3.34-1.36) * 100.0;
}
- sliding_window_moving_average:
window_size: 5
send_every: 5
unit_of_measurement: "%"
- platform: wifi_signal
name: ${loc} Signal
icon: 'mdi:signal-variant'
update_interval: 30s
- platform: template
name: "${loc} Sleep Time"
icon: "mdi:sleep"
id: sleep_status
accuracy_decimals: 2
update_interval: never
unit_of_measurement: 'min'
- platform: homeassistant
id: temperature_calibration
entity_id: input_number.${loc}_temperature_calibration
accuracy_decimals: 1
internal: true
- platform: homeassistant
id: pressure_calibration
entity_id: input_number.${loc}_pressure_calibration
accuracy_decimals: 2
internal: true
- platform: homeassistant
id: humidity_calibration
entity_id: input_number.${loc}_humidity_calibration
accuracy_decimals: 1
internal: true
- platform: homeassistant
id: voltage_calibration
entity_id: input_number.${loc}_voltage_calibration
accuracy_decimals: 2
internal: true
deep_sleep:
sleep_duration: 9.25min
id: deep_sleep_1
binary_sensor:
- platform: homeassistant
id: prevent_deep_sleep
entity_id: input_boolean.prevent_deep_sleep
script:
- id: consider_deep_sleep
mode: queued
then:
- delay: 45s
- if:
condition:
binary_sensor.is_on: prevent_deep_sleep
then:
- deep_sleep.prevent: deep_sleep_1
- logger.log: "Skipping deep sleep"
else:
- deep_sleep.enter: deep_sleep_1
- script.execute: consider_deep_sleep
time:
- platform: homeassistant
id: esptime
It boots up fine and detects the bme280 sensor, but the only values I get returned look like this:
[22:21:54][D][sensor:094]: 'Garden Altitude': Sending state nan m with 1 decimals of accuracy
[22:21:54][D][sensor:094]: 'Garden Relative Pressure': Sending state nan hPa with 2 decimals of accuracy
[22:21:55][D][sensor:094]: 'Garden Battery Voltage': Sending state nan V with 2 decimals of accuracy
[22:22:04][D][sensor:094]: 'Garden Temperature': Sending state nan °F with 1 decimals of accuracy
[22:22:04][D][sensor:094]: 'Garden Pressure': Sending state nan hPa with 2 decimals of accuracy
[22:22:04][D][sensor:094]: 'Garden Humidity': Sending state nan % with 1 decimals of accuracy
[22:22:04][D][sensor:094]: 'Garden Soil Moisture': Sending state 100.00000 % with 2 decimals of accuracy
[22:22:05][D][sensor:094]: 'Garden Relative Pressure (US)': Sending state nan inHg with 2 decimals of accuracy
[22:22:06][D][sensor:094]: 'Garden ADC Voltage': Sending state nan V with 2 decimals of accuracy
[22:22:06][D][sensor:094]: 'Garden Battery Level': Sending state nan % with 0 decimals of accuracy
[22:22:07][D][sensor:094]: 'VCC': Sending state nan V with 2 decimals of accuracy
[22:22:08][D][sensor:094]: 'Garden Signal': Sending state -56.00000 dBm with 0 decimals of accuracy
[22:22:09][D][sensor:094]: 'Garden Altitude': Sending state nan m with 1 decimals of accuracy
[22:22:09][D][sensor:094]: 'Garden Relative Pressure': Sending state nan hPa with 2 decimals of accuracy
[22:22:10][D][sensor:094]: 'Garden Battery Voltage': Sending state nan V with 2 decimals of accuracy
and although I have a helper in homeassistant input_boolean.prevent_deep_sleep set up via the homeassistant binary sensor, the device always goes into deep sleep, as if it can’t read that value. What is going on? I never had these issues before. The only change I had to make to my code recently was changing the bme280 platform to bme280_i2c. I am using all new sensors and components, but even the adc sensor isn’t retuning any values, which should just be a voltage signal.