Messuring water temperature with ds18b20. Sending it all to thingspeak.
Ok guys. So im plan to make this as easy as possible. So i need a web developer to help me.
I want to make something like this for my water sensors.
So if anybody is willing to contribute please contact me. Custom all in one boards are in production and lets see what comes from this.
For now everything is good. Its still working. The battery has been staying around 81% in really bad weather. Its been rain,rain and rain.
Ok so i have put one of my sensors to the test. I has been put by a river 2 days ago.
We will see how long my waterprof case lasts.
During my tests the arduino mini pro 3.3v and the sim800 module use a lot less power.
Currently im running them on a tiny solar panel and a bad 600mAh battery that charges up to 60% max.
So i have made a all in one pcb to make my final project.
Well here is how it currently looks. The case is watertight. My plan is to mount it on a tree close to the water and then just drop the sensor probe into the water. Im still searching for a on the water buoy that can possibly hold the whole setup.
They use a lot less power then the Elecrow A6 module board with the 32u4 Arduino.
Want to see how much. Battery charged from 87% to 97% in sensor reading cycles that are 15min each.
Its a cloudy day today and i did not use that 2.5W solar panel. I used a tiny tiny 0.6W panel that runs at 6V. The 2.5W panel runs at 5V.
Remeber that first project log. Well the board i made for that prototype arived and i assembled it.
Soldered the arduino mini pro 3.3v as close as i can to the board. Did the same for all other components.
R1 is ment to be used as the 4.7K Resistor for the DS18B sensor between vcc and data. Other resistors are soposed to be a voltage devider but i dont need it since i can get the voltage in mV with AT+CBC from the gsm module.
Chepo ebay TP4056 charge module. I made the board for the one that has battery protection but this one fits to as the other one did not arrive yet.
Remove this resistor to enable software powering on and off for the gsm module.
Thats it for now. Will try it out. The SIM800l module may be better in a way of power usage.
I have been testing it outside from last night. Battery went down to 45% during the night.
This morning really cloudy and to my amazment the % was going up 1% every 15min on the sensor read cycle.
The panel im using a 2.5W epoxy type cheap ebay panel. Its scrached a lot and in really bad shape.
I think it cost me like 3-4$ on ebay
So this is a WIN. Il leave it outside a week or two and see what happens.
Hopefully it wont lock up since i have not implemented the WDT timer to clear lock up's.
Well it is working complete with a solar panel. We will have to see how long it will work.
Here is the code and the library's neaded:
https://github.com/n0m1/Sleep_n0m1 //Sleep Library
https://github.com/adafruit/DHT-sensor-library //DHT22 Library
https://github.com/milesburton/Arduino-Temperature-Control-Library // Dallas temperature library
Ok so i have found a all in one cheap solution that is perfect for me.
We can drop this whole list.
And lets get ready for this nice board from Elecrow.
It has a A6 GSM module on it with a 32u4 arduino running at 5v. The A6 module is nativly run on a lipo.
For the arduino chip there is a regulator.
There are 8 connectors on top. A connector for audio and mic, 2 digital connectors, 1 analog, 1 I2C, lipo connector, ISP header and a usb port.
I allready have it in hand i ticking away with some new code