Hi! Could you please share the connection diagram?
Thank you!
Hi all,
I am having issues with my MPU6050 sensor. I added it to HomeAssistant via ESPHOME with the configuration shown below. The configuration is uploaded without issues, however, the readings are “unknown” - “nan”
Any ideas on what I am doing wrong here?
captive_portal:
i2c:
scl: GPIO5
sda: GPIO4
scan: true
sensor:
- platform: mpu6050
address: 0x68
accel_x:
id: accel_x1
name: "accel X1"
accel_y:
id: accel_y1
name: "accel Y1"
accel_z:
id: accel_z1
name: "accel Z1"
gyro_x:
name: "gyro X1"
gyro_y:
name: "gyro Y1"
gyro_z:
name: "gyro Z1"
temperature:
name: "MPU6050 Temperature"
update_interval: 1.5s
- platform: template
id: roll1
name: pan1roll
accuracy_decimals: 2
lambda: |-
return (atan( id(accel_y1).state / sqrt( pow( id(accel_x1).state , 2) + pow( id(accel_z1).state , 2) ) ) * 180 / PI) ;
update_interval: 250ms
- platform: template
id: pitch1
name: pan1pitch
accuracy_decimals: 2
lambda: |-
return (atan(-1 * id(accel_x1).state / sqrt(pow(id(accel_y1).state, 2) + pow(id(accel_z1).state, 2))) * 180 / PI);
update_interval: 250ms
Connections are sensor → esp8266mod
Vcc->3V
Gnd->G
scl->D1
sda->D2
Make sure you have good connections.
The initial setup of the MPU only happens once at boot and if the connections are bad then you get nan.
Thanks for your reply! It seems my MPU is defective. I connected another one and it worked without problems.
Thanks!!!
@mattclar - keep in mind that I am using the GY-25A sensor as mentioned upthread. That said, here the relevant chunks of code:
esphome:
name: pergola-sensor
platform: ESP8266
board: d1_mini
# Pins Used
# A0 - Sensor in
globals:
- id: angle_offset_voltage
type: float
restore_value: no
# Set to dummy value so we can figure out if we've rebooted later
initial_value: '999.9'
The global is used as a cheat to see if power has been cycled. I did that rather than saving the offset voltage to the ESP since that has a finite number of writes and it’s in an inconvenient place to replace. I store the actual value in an MQTT queue that I read with a small Node-RED flow.
# Set up angle sensor
sensor:
- platform: adc
pin: A0
# name: "Pergola Angle Voltage"
id: angle_voltage
update_interval: 10ms
accuracy_decimals: 3
# Smooth sensor voltage for calibration
- platform: template
id: angle_voltage_smoothed
lambda: return (id (angle_voltage).state);
update_interval: 100ms
accuracy_decimals: 3
filters:
- sliding_window_moving_average:
window_size: 50
send_every: 10
# Expose angle offset from HA
- platform: homeassistant
name: "Stored Angle Sensor Offset"
entity_id: sensor.angle_sensor_offset_voltage
id: stored_angle_sensor_offset
accuracy_decimals: 2
# Calculate angle from sensor
- platform: template
id: pergola_angle
name: "Pergola Angle"
update_interval: 100ms
accuracy_decimals: 0
# x-axis 0-360 deg is proportional to 0-1 volt, so this is an easy calculation
lambda: return ((id (angle_voltage).state - id (angle_sensor_offset).state) * 360);
unit_of_measurement: "°"
# Expose angle offset back to HA
- platform: template
id: angle_sensor_offset
name: "Angle Sensor Offset"
update_interval: 1s
accuracy_decimals: 2
lambda: |-
if (id (angle_offset_voltage) > 5.0) {
return (id (stored_angle_sensor_offset).state);
} else {
return (id (angle_offset_voltage));
}
# Surface button for sensor offset calibration
button:
- platform: template
name: "Calibrate Tilt Sensor"
icon: "mdi:restart"
on_press:
- lambda: |-
id (angle_offset_voltage) = id (angle_voltage_smoothed).state;
I will get around to cleaning this code up one day, but it works fine for now.
People might be interested in this, too:
https://van-automation.com/adding_van_tilt_sensor.html
1 Like
This is working much better for me, thanks
ESP Code:
esphome:
name: solarangle1
esp8266:
board: d1_mini
# Enable logging
logger:
i2c:
sda: GPIO4
scl: GPIO5
scan: true
# Enable Home Assistant API
api:
sensor:
- platform: mpu6050
address: 0x68
update_interval: 200ms
accel_x:
name: "MPU6050 Accel X1"
accel_y:
name: "MPU6050 Accel Y1"
ota:
password: "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
wifi:
ssid: !secret iotwifi_ssid
password: !secret iotwifi_password
# Enable fallback hotspot (captive portal) in case wifi connection fails
ap:
ssid: "Solarangle1 Fallback Hotspot"
password: !secret wifi_password
web_server:
port: 80
captive_portal:
Home assistant code:
- platform: template
sensors:
######################
# Solar Angle 1 Code #
######################
solar1x_angle:
friendly_name: "X Angle1"
unit_of_measurement: "°"
value_template: '{{ ((asin((states("sensor.mpu6050_accel_x1") | float) / 9.81) * 180 / pi) - 2.8) }}'
solar1y_angle:
friendly_name: "Y Angle1"
unit_of_measurement: "°"
value_template: '{{ ((asin((states("sensor.mpu6050_accel_y1") | float) / 9.81) * 180 / pi) + 0.3) }}'
- platform: filter
name: "Filtered Solar 1 X Angle"
entity_id: sensor.solar1x_angle
filters:
- filter: lowpass
time_constant: 5
precision: 1
- platform: filter
name: "Filtered Solar 1 Y Angle"
entity_id: sensor.solar1y_angle
filters:
- filter: lowpass
time_constant: 5
precision: 1