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How MMQT get BATTERY_LEVEL

Ivan Z Hardware Contributor 19 Nov 2014, 07:54 last edited by

How MMQT get I_BATTERY_LEVEL information?
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Update RF24 library to latest version
Bug Reports • 23 Mar 2014, 23:37 • andriej 24 Mar 2014, 22:52

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24 Mar 2014, 22:52

@andriej Hi, I had problem using the main branch mysensors/Raspberry, that because of the bit-field struct (header_s) in Sensor.h They will get packed in different order on the arduino compared to the RPi (at least with my compiler, gcc). In order to fix this I created the 1.4dev branch. It uses full bytes instead of the bit-fields, but you need (of cause) to compile both the sensors (arduino) and the gateway (RPi) using the 1.4dev branch. We need to fix this in the main branch later on (and use the same files as in mysensors/Arduino/libraries/MySensors)
Which device I have to use to connect with accelerometer before connecting to my pc?
General Discussion • 24 Jan 2023, 17:16 • Yada Kijsathan 15 days ago

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When connecting an accelerometer to your PC, consider its communication protocol (I2C or SPI) and the appropriate interface device, like a microcontroller (e.g., Arduino). You may also need additional hardware for voltage adjustment or signal conditioning, depending on the sensor’s specifications.
Meet in Malmö, Summer 2016?
General Discussion • 1 Feb 2016, 15:34 • bjacobse 28 days ago

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Maybe next summer the 10 years after party? I would still like to meet all of you guys in real person
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General Discussion • 23 Sept 2024, 17:48 • kiesel 7 days ago

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Well, my network with two handfulls of nodes in three different locations is still live and kicking! I agree that there does not seem to be a lot happening in the community. I'm running 2.4.0- alpha since this gives support for MQTT over TLS. Just managed today to create one more MQTT GW after reading a lot about support for ESP8266. You know, these things you do once per year and have to learn new each time. MySensors is the cheapest way I have found to create small sensor nodes etc. But now slowly running out of my supply of hardware. Well, time will tell...
Email notifications received twice
General Discussion • 6 Feb 2023, 16:15 • Jodaille 5 days ago

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It looks like duplicate email notifications may be linked to system settings or preferences. Have you noticed if the issue happens after specific actions or changes? Investigating your notification settings might shed some light
Why is the output of ACS712 current measurement module unchanged?
General Discussion • mysensors • 19 Jul 2021, 09:09 • Tessie T 3 days ago

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@ZenBlizzard in case you are measuring the output with a multimeter, you will get an averaged level, since AC current waveform should be sinusoidal and overlapped with the Vcc/2->2.56V in your case. To measure the current you need a decently high sampling and some math. #define SENSITIVITY 66 // mV/A const float readings = 5; const float alpha = 2.0 / (2 * readings + 1); for (ifor = 0; ifor < 250; ifor++) { // Voltage voltageSampleRead = analogRead(V) * vccRead / 1023 - vccRead / 2; /* read the sample value including offset value*/ voltageSampleSum = voltageSampleSum + sq(voltageSampleRead); /* accumulate total analog values for each sample readings*/ voltageSampleOffsetSum = voltageSampleOffsetSum + voltageSampleRead; // Current currentSampleRead = analogRead(I) * vccRead / 1023 - vccRead / 2; /* read the sample value including offset value*/ currentSampleSum = currentSampleSum + currentSampleRead * currentSampleRead; /* accumulate total analog values for each sample readings*/ currentSampleOffsetSum = currentSampleOffsetSum + currentSampleRead; wait(1); } voltageMean = voltageSampleSum / ifor; /* calculate average value of all sample readings taken*/ voltageOffset = voltageSampleOffsetSum / ifor; reading = (sqrt(voltageMean) - voltageOffset) * 230.0 / 1.0; // read voltage / reported voltage. voltage = round_to_dp(alpha * reading + (1 - alpha) * voltage,1); Serial.println(voltage); if (voltage < 25) voltage = 0; currentMean = currentSampleSum / ifor; /* calculate average value of all sample readings taken*/ currentOffset = currentSampleOffsetSum / ifor; reading = (sqrt(currentMean) - currentOffset) / SENSITIVITY * 1000 - currentZeroOffset; // subtract no load current. if (reading < 0) reading = 0; current = round_to_dp( alpha * reading + (1 - alpha) * current,2);

How MMQT get BATTERY_LEVEL

Suggested Topics

Update RF24 library to latest version
Bug Reports • 23 Mar 2014, 23:37 • andriej 24 Mar 2014, 22:52

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General Discussion • 6 Feb 2023, 16:15 • Jodaille 5 days ago

Why is the output of ACS712 current measurement module unchanged?
General Discussion • mysensors • 19 Jul 2021, 09:09 • Tessie T 3 days ago

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How MMQT get BATTERY_LEVEL

Suggested Topics

Update RF24 library to latest version Bug Reports • 23 Mar 2014, 23:37 • andriej 24 Mar 2014, 22:52

Which device I have to use to connect with accelerometer before connecting to my pc? General Discussion • 24 Jan 2023, 17:16 • Yada Kijsathan 15 days ago

Meet in Malmö, Summer 2016? General Discussion • 1 Feb 2016, 15:34 • bjacobse 28 days ago

No merge into master in the last 5 years, should we use development? General Discussion • 23 Sept 2024, 17:48 • kiesel 7 days ago

Email notifications received twice General Discussion • 6 Feb 2023, 16:15 • Jodaille 5 days ago

Why is the output of ACS712 current measurement module unchanged? General Discussion • mysensors • 19 Jul 2021, 09:09 • Tessie T 3 days ago

0Online

11.5kUsers

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Update RF24 library to latest version
Bug Reports • 23 Mar 2014, 23:37 • andriej 24 Mar 2014, 22:52

Which device I have to use to connect with accelerometer before connecting to my pc?
General Discussion • 24 Jan 2023, 17:16 • Yada Kijsathan 15 days ago

Meet in Malmö, Summer 2016?
General Discussion • 1 Feb 2016, 15:34 • bjacobse 28 days ago

No merge into master in the last 5 years, should we use development?
General Discussion • 23 Sept 2024, 17:48 • kiesel 7 days ago

Email notifications received twice
General Discussion • 6 Feb 2023, 16:15 • Jodaille 5 days ago

Why is the output of ACS712 current measurement module unchanged?
General Discussion • mysensors • 19 Jul 2021, 09:09 • Tessie T 3 days ago

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