Planning a LPG/Propane Tank BLE Weight Sensor

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Using a 12kg LPG Tank at my kitchen stove. It doesn’t have any level gauge on. One tank goes about 2-3 months for my needs roughly. And i run out of LPG at the most non-convenient times…

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And i thought i need a sensor to show the amount of LPG left in the tank. There are many options, ultrasonic level sensor, gauge on the hose, weight of the tank etc.

I decided that the weight measuring would be the best and trustable solution. The easiest way would be like in this DIY example.

So i already have 4 load cells and HX711 ready for this. But instead of ESP, i want a battery solution like zigbee or BLE; i do not want 220V or any adapter near my LPG tank. For this i also have nrf51822 BLE and ST-link v2 at hand. So i will simply program nrf51822 and connect all load cells and HX711. So far so good, but my problem is that this is my first time with nrf BLE programming and i have no idea how to do it, yet.

Is there anyone out there who can help me with this, or propose any other solution for a battery powered weight sensor? This could also be used for many other purposes, not only LPG tank…

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I know I’m a little late, but did you work out a solution yet?

I designed a very simple scale to weight the salt brine tank on my water softener using an esp32 running on 5 volts from an extra usb charger feeding live data to Home Assistant through wifi.

Now, I’m planning another setup to weigh my 500 gallon propane tank outside the house, wirelessly, without batteries using solar and supercaps for power.

Size doesn’t matter, so it really makes no difference what the object you want to weigh is. Perhaps I could give you a hand?