Hi Friends,
what I want to present to you is not a digital dashboard but a physical device to hang on your wall:
Oh man, a few months ago I was researching some retro style gauges to create something similar to this… If you could provide more detail on setup and hardware that would be much appreciated!!!
Thanks Tommy!
I’m happy to share setup and code with you. I’ll prepare the code and post it here soon.
import time
import network
import urequests as requests
from machine import Pin, PWM
import json
led = Pin("LED", Pin.OUT)
led.on()
servo1 = PWM(Pin(0))
servo1.freq(50)
servo2 = PWM(Pin(1))
servo2.freq(50)
#while True:
for position in range(2000,8000,50):
servo1.duty_u16(position)
time.sleep(0.01)
for position in range(8000,2000,-50):
servo1.duty_u16(position)
time.sleep(0.01)
for position in range(2000,8000,50):
servo2.duty_u16(position)
time.sleep(0.01)
for position in range(8000,2000,-50):
servo2.duty_u16(position)
time.sleep(0.01)
led.off()
# Wifi connection
ssid = 'your wifi SSID'
password = 'your wifi password'
# home assistant bearer token
bearerToken = "your bearer token"
wlan = network.WLAN(network.STA_IF)
wlan.active(True)
wlan.connect(ssid, password)
# Wait for connect or fail
max_wait = 10
while max_wait > 0:
if wlan.status() < 0 or wlan.status() >= 3:
break
max_wait -= 1
print('waiting for connection...')
time.sleep(1)
# Handle connection error
if wlan.status() != 3:
led.off()
raise RuntimeError('network connection failed')
else:
print('connected')
led.on()
status = wlan.ifconfig()
print( 'ip = ' + status[0] )
Battery = 0
PvPower = 0
while True:
# connect to the hoemassistant data source that you want to display
urlPvPower = "http://homeassistant.local:8123/api/states/sensor.pv_power_now"
urlBattery = "http://homeassistant.local:8123/api/states/sensor.battery_soc"
headers = {"Authorization": "Bearer " + bearerToken}
# Then send it in a try/except block
try:
print("querying...")
led.on()
response = requests.get(urlPvPower, headers=headers)
print("sent (" + str(response.status_code) + "), status = " + str(wlan.status()) )
resJson = json.loads(response.content)
PvPowerStr = resJson["state"]
print("PV Leistung: " + PvPowerStr)
PvPower = int(float(PvPowerStr))
response = requests.get(urlBattery, headers=headers)
print("sent (" + str(response.status_code) + "), status = " + str(wlan.status()) )
resJson = json.loads(response.content)
BatteryStr = resJson["state"]
print("BatterieStr: " + BatteryStr)
Battery = int(BatteryStr)
response.close()
led.off()
except Exception as e:
print("***\nException while calling HA API. ex: " + str(e))
print("could not connect (status =" + str(wlan.status()) + ")")
if wlan.status() < 0 or wlan.status() > 3:
print("trying to reconnect...")
wlan.disconnect()
wlan.connect(ssid, password)
if wlan.status() == 3:
print('connected')
else:
print('failed')
# control servos
#for position in range(2000,8000,50):
position = int(7900 - Battery * 60)
servo1.duty_u16(position)
print("Battery servo position: " + str(position))
position = 7900 - PvPower
servo2.duty_u16(position)
print("PvPower servo position: " + str(position))
time.sleep(8)
Hardware:
attach two standard analog servers to “Raspberry Pi Pico W” with their signal lines to GP0 and GP1 on the pico.
Software:
Get started with pi pico and Micropython.
Find the data URL that you want to use in home assistant and enter them in line 67 and 68 of the source code
Get a long-lived access token like described here and paste it into line 69
If you have further questions, get back to me. And tell me what you built.
Cheers Wido
Awesome thanks!!!
First job will be to find the right servos… Do you have a link for th eones you got?
Doesn’t matter too much. Just don’t buy the very cheap blue ones. They are loud and not precise. Just search for “MG90 Servo” on amazon, alibaba or your favourite seller.
Good luck and keep me/us posted.
Cheers, Wido
