model
New Member
Posts: 11
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Post by model on Jan 19, 2023 21:15:05 GMT -8
I am updating to hydroponics from just a watering system with bluetooth sensor. My temperature DS18B20 probe is wired in correctly and receives power but indicates '-1 ' on the lcd and mqqt outputs. Whilst unpowered I have checked continuity of the sensor all the way through to the grove soldered pins on the extender board (via a 50cm grove cable plugged into serial grove on wiring hub). I have tested the sensor with a pi pico and I can read temperatures. Also checked that the 4.7k pull up resistor is in place on the wiring hub. Any help appreciated on further diagnosing this issue. P.S> I have also changed the sensor but had the same result.
Dave
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model
New Member
Posts: 11
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Post by model on Jan 20, 2023 9:07:35 GMT -8
Further to my original posting I removed the battery from the bluetooth sensor and put the temperature probe into some warm water. Received the following message on SG3.py terminal reading temp as 52.88 deg C. but recorded on dash graph as -1 and also -1 in sql database. Before I moved it into warm water it read around 20 deg C on the same terminal message. So seems it is reading temp probe but not able to record it
>>>>>>Valve Check<<<<<<
Found Moisture Sensor = BT/B6:39/tomato/28CD
MQTT: Sending PINGREQ
MQTT: Received PINGRESP
MQTT: Received PUBLISH (d0, q0, r0, m0), 'SGS/28CD', ... (207 bytes)
Wireless MQTT Message received: b'{"id": "28CD", "messagetype": "7", "timestamp": "01/20/2023 16:58:35", "temperature": "52.88", "rawlevel": "184", "rawturbidity": "181", "rawtds": "182", "rawph": "183", "sensortypes": "TDS1 TUR1 PH1 LFS1 "}'
Hydroponics Message Recieved
Processing HydroponicsSensorMessage
rawLeve= 184.0
myScale = 0.20087336244541484
Level= 100
voltage= 0.549
slope:
-0.016903313049357674
,intercept:
7.0
query= INSERT INTO Hydroponics(DeviceID, Temperature, Turbidity, RawTurbidity, TDS, RawTDS, Level, RawLevel, Ph, RawPH) VALUES('28CD', ' -1.00', -1.00, '181', ' -1.00',182, 100.00, 184.00, -1.00, 183)
--------------------
Garden Cam Picture Taken
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Post by SDL on Jan 22, 2023 11:12:43 GMT -8
Model,
The temperature write you are looking at is NOT the Bluetooth temperature. That is the temperature of the hydroponics unit. The DS18820 is the problem.
You can see your bluetooth temperatures in the SQL table BluetoothSensorData
Regarding your problem. Could you post a picture so I can check your wiring? Can you try a shorter Grove Cable?
BP
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model
New Member
Posts: 11
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Post by model on Jan 23, 2023 14:51:04 GMT -8
I had previously copied the SD card to one with same manufacturer and quality to allow my master to be saved. The error seemed to be only on the SD copy. It worked perfectly with the master SD purchased from yourselves. Once I had reformatted the copy again and copied master using Pi clone again it worked this time. So no more errors on the DS18820 Temp sensor! In fact it is all working now with only PH sensor to add. Took me a while to find out how go and update the IR pic as it is stuck on another extender ID because this is specified in the dash hydroponics page, suggestion would be to add this to the software part of the hydroponics assembly and test manual
Is there a better way to copy the SD?
Thanks
Dave
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Post by SDL on Jan 26, 2023 8:20:17 GMT -8
We copy them with an industrial multi copy unit. Sounds like you either had a bad SDCard or this is something wrong with your copying process. I suspect the card. Cheap ones don't work well.
BP
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