self.raymond asked 11 months ago
import machine
import onewire
import ds18x20
import time
ds_pin = machine.Pin(4)
ds_sensor = ds18x20.DS18X20(onewire.OneWire(ds_pin))
roms = ds_sensor.scan()
print('Found DS devices: ', roms)
def read_ds_sensor():
roms = ds_sensor.scan()
#print('Found DS devices: ', roms)
print('Temperatures: ')
ds_sensor.convert_temp()
time.sleep(1)
for rom in roms:
temp = ds_sensor.read_temp(rom)
if isinstance(temp, float):
temp = temp * (9/5) + 32.0
print(temp, end=' ')
print('Valid temperature')
I have been trying to add sensor to my project. bytearray(b'(l\x05V\x08\x00\x00\x86′) and bytearray(b'(e\xedU\x08\x00\x00|’). I have look in the Micropython esp32 and esp8266 pdf book. Any help would be greatly appreciate. Not a lot of information for multiple sensors that I can find for the Micropython. Thank You
Sara Santos Staff answered 11 months ago
Hi Ray.
That code gets the temperature for multiple sensors.
What exactly do you want to do? Do you want to get each sensor reading in a variable to use later?
Regards, Sara
self.raymond answered 11 months ago
Thank you Sara for your help. Being able to read each sensor and print the temp would be very helpful. Temp 1 print Temp 2 print Temp 3 print. This way I can compare the temp range and turn on a relay.
The pdf Micropython esp8266 and esp32 cover using one ds18b20 rather well but not using more that 1.
Again thank you for your help
Ray
Sara Santos Staff answered 11 months ago
Hi Ray. I think something like this should work:
temperatures = [] ds_sensor.convert_temp() time.sleep_ms(750) for rom in roms: print(rom) print(ds_sensor.read_temp(rom)) temperatures.append(ds_sensor.read_temp(rom)) time.sleep(5) temperature1 = temperatures[0] temperature2 = temperatures[1]
I hope this helps.
Regards, Sara
self.raymond answered 11 months ago
To simple.. Why was I thinking the bytearray was the key?? Wow thank you again for your help.
Sara Santos Staff answered 11 months ago
You’re welcome.
I’ll mark this question as resolved. If you need further help, you just need to open a new question in our forum.
Regards,
Sara