Replies: 8 comments 20 replies
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I would also be interested and would like to add the question how much difference the RX/TX power makes. According to docs, increasing RX power needs a strobger power supply. So how much can you save by decreasing RX/TX power? |
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A 50% discharged CR2032 cannot deliver more than +3 dBm of current for RF TX. The communication distance in "LE Long Range" mode and TX 0 dBm is more than 500 meters. |
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What does the "AdsFlag" checkbox do? What happend if I disable it? Would I disable Bluetooth Ads? |
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I have a bunch of these and once they are custom flashed is there any way except the browser to adjust settings or upgrade firmware? Would be neat if there was a CLI way to address and update/adjust the settings. |
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For hardware changes, you could upgrade the battery to a CR2450: I believe a 220uF 6.3V tantalum capacitor is required. I'm wondering if this would work as suggested above: Has anyone added the capacitor and tested yet? It's been discusted a few times but I don't think any long term tests. Edit: Pvvx recommended "Installing the missing 22..47 μF capacitor (tantalum or ceramic) in the LYWSD03MMC in the power supply increases the operating time of CR2032 by 40%." |
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I've just ordered some "47uF 10V X5R 20% SMD 1206 MLCC SAMSUNG MLCC CL31A476MPHNNNE" to test... |
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47uF didn't seem enough for LE Long Range when the battery is low so I've added a TAIYO YUDEN 16V 100uF X5R 1210 20% MLCC |
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@pvvx hi, why the Advertising interval and Measure Interval cannot be set to higher values than 10k/24 respectively? Is it outside BT specs? Thanks |
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Hi everyone, I'm starting to use the LYWSD03MMC sensors with the custom firmware and I wanted to ask if with your experience you can tell me how to configure the various parameters of the 4.6 firmware to optimize battery life.
I am referring to the following parameters:
Sensor in "LowPower mode"
Advertising type
AdFlags
Advertising interval
Measure interval
I'm using these devices with home assistant through a bluetooh proxy
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