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re: Which one of you made $10k last month mining Helium?
Posted on 1/3/22 at 5:17 pm to Korkstand
Posted on 1/3/22 at 5:17 pm to Korkstand
quote:So when transmitting once every 10 minutes, it lasted about 100 hours on the 1,000mah pack. When transmitting once every 5 minutes, it still lasted right at 100 hours. The sensor measurements and data transmissions happen so quickly that they hardly burn any power, so pretty much the entire battery capacity was burned during idle. I realized it was never going into a low power sleep mode, so after adding a popular low power library to the code, the difference so far is pretty drastic:
I have a battery life test in progress right now. It is transmitting every 10 minutes and will do so until it dies. I will do it again and transmit every 5 minutes until dead. After that I think I can do a little algebra and figure out how much battery is consumed per transmission vs. when the device is idle. Then I will know which parts of the code need to be optimized first.
The top curve is with the low power code. I don't know how long it will last, but obviously it is a big improvement. And I'm sure there are more things I could do to improve battery life.
I also managed to get a second hotspot set up in my neighborhood. This not only improved my mining rewards drastically due to witnessing, but it's giving me an idea of the coverage range of different setups for end devices. The hotspot is inside the home, and has the small stock antenna. My little battery powered devices are inside my home 1/4 mile away, and their transmissions are still being picked up with signal strength to spare. Pretty crazy.
2
Posted on 1/3/22 at 7:58 pm to Korkstand
Nice. Are you taking orders? I don't even know that I could possibly need but I certainly can't do it myself.
Posted on 2/5/22 at 10:27 pm to Korkstand
Don't know if anyone here cares, but I think it's neat so I'll keep updating. I've been working on these sensor devices when I have time, so here's where I am so far.
Turns out I still wasn't using sleep mode properly, and I also had my sensor wired so that it was drawing power all the time (a small amount but enough to matter here). After fixing those errors I've started a new longevity test, and so far it's looking like it'll last about 3 months on 5 minute transmission intervals. It should last nearly twice as long with 10 minute intervals, and if I switch to an 18650 cell that should triple the life again. Also there are probably more things I should be doing to lower the power consumption during sleep, so more work to do here.
I also configured the helium console with a custom MQTT integration pointed at my Home Assistant server, so I'm getting my readings in HA so I can set up some automations. Here are the temp readings from inside my freezer, which is where this sensor has been living for the last few hours:
Looks like the compressor kicks on about every 30 minutes. I'll probably set up a notification if the temp ever gets above 5 degrees, and another for if those compressor cycles ever start stretching out.
Next up I will probably do a mailbox notifier because I've always wanted one. There are a few commercial options, with Ring being one of the cheapest at $30, but frick Amazon. I'll power mine with a couple of CR2032 coin cells which I hope will last a few years doing only a couple transmissions per day. If I can package it up nicely, I might sell kits or pre-assembled units if anyone is interested. Should have coverage most anywhere judging by the Helium map. I'll build a simple companion app for notifications, and of course an API for integration with HA or whatever else you want to use.
quote:So that "drastic" improvement amounted to about 12 days vs. the original 4 days. Again this is using a 1,000 mah lipo pack, which measures about 1"x1.5"x.25".
I realized it was never going into a low power sleep mode, so after adding a popular low power library to the code, the difference so far is pretty drastic
Turns out I still wasn't using sleep mode properly, and I also had my sensor wired so that it was drawing power all the time (a small amount but enough to matter here). After fixing those errors I've started a new longevity test, and so far it's looking like it'll last about 3 months on 5 minute transmission intervals. It should last nearly twice as long with 10 minute intervals, and if I switch to an 18650 cell that should triple the life again. Also there are probably more things I should be doing to lower the power consumption during sleep, so more work to do here.
I also configured the helium console with a custom MQTT integration pointed at my Home Assistant server, so I'm getting my readings in HA so I can set up some automations. Here are the temp readings from inside my freezer, which is where this sensor has been living for the last few hours:
Looks like the compressor kicks on about every 30 minutes. I'll probably set up a notification if the temp ever gets above 5 degrees, and another for if those compressor cycles ever start stretching out.
Next up I will probably do a mailbox notifier because I've always wanted one. There are a few commercial options, with Ring being one of the cheapest at $30, but frick Amazon. I'll power mine with a couple of CR2032 coin cells which I hope will last a few years doing only a couple transmissions per day. If I can package it up nicely, I might sell kits or pre-assembled units if anyone is interested. Should have coverage most anywhere judging by the Helium map. I'll build a simple companion app for notifications, and of course an API for integration with HA or whatever else you want to use.
This post was edited on 2/6/22 at 11:46 am
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