self.raymond asked 5 years 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 5 years 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 5 years 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 5 years 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 5 years ago
To simple.. Why was I thinking the bytearray was the key?? Wow thank you again for your help.
Sara Santos Staff answered 5 years 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