Read battery percentage using Arduino
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Is it possible to read battery info of an Android with an Arduino via Bluetooth without an external app on the Android side .
For example . Bluetooth connection to a cars media player shows battery life , signal strength ,etc....
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@vijayvarghese The answer is "NO". If my guess is correct, you might have misunderstood the working of Classic Bluetooth and Bluetooth Low Energy(BLE). You cannot acquire battery percentages, RAM usage directly just by connecting HC-05 to Arduino and connecting it to mobile phones. Because our mobile phones don't share any characteristics to outside just through Bluetooth.
The example of car which you have stated is just applicable to the automobile field. If you are able to read the battery percentage, signal strength kind of parameters that means that the car's BLE has been programmed with those characteristics to be displayed. To be simple, it means that the Bluetooth inside the car has been given permission to display those. It depends upon the BLE configuration used and security levels. You cannot access any parameters from mobile phone just with Arduino and HC-05 Bluetooth module.
If you want to learn more about this please read the post in makergram named "Automatic pairing of ESP32 using BLE" where @salmanfaris has given a detailed explanation of how BLE works. If you want to work out how BLE's work, try connecting your MI Band(Or any smart wrist bands) to the nRF Connect Mobile app(Can be found in play store for free). Try seeing what parameters are displayed. please write back in case of queries.!!
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@kowshik1729 Thank you ..
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Hi team,
Any one have experience in Altium schematic designing.
I am facing some issue in Hierarchy->harness in Schematic.
The offpage number for harness is not showing, and while generation the smart PDF if we click the harness port /green box the page want to go there automatically, but that also not working. -
Hi @dipu_varghese ,
Here is the sample input from the binary edge impulse inference,
Predictions (DSP: 16 ms., Classification: 1 ms., Anomaly: 2 ms.): idle: 0.91016 snake: 0.08203 updown: 0.00391 wave: 0.00391 anomaly score: -0.067”And from here for example we can try to get the updown values only by attaching the device to another controller and read the Serial string directly.
void setup() { // Start serial communication at 9600 baud Serial.begin(9600); } void loop() { // Wait until there is data available on the serial port while (!Serial.available()) { // Do nothing } // Read the input string from the serial port String inputString = Serial.readStringUntil('\n'); // Find the position of the "updown" value in the input string int updownPos = inputString.indexOf("updown:"); // If the "updown" value was found in the input string if (updownPos >= 0) { // Extract the "updown" value from the input string String updownString = inputString.substring(updownPos + 8, inputString.indexOf('\n', updownPos)); // Convert the "updown" value to a float float updownValue = updownString.toFloat(); // Output the "updown" value Serial.println(updownValue); } }The sketch should then output the "updown" value, which is 0.08203.
Hope this will be helpful, let me know if you need more clarification.