frohr
Senior Member

Just for information - I tested USB isolator and the noise disappeared. https://www.laskakit.cz/usb-2-0-izolator/#relatedFiles

I measured low noise on my PC: And much higher nosie with my laptop and tablet: Now I am pretty sure it will be not possible to send my data via bluetooth so I have to solve the noise. ¨

What about this module? Maybe it can work. Up to 2Mbps. https://ai-thinker.eu/product/ai-thinker-nrf24l01-wireless-module-2-4-g-wireless-transceiver-communication-module-nf-01-s/

I am checking now my code for usb cable data transfer and try to modify for bluetooth. #define BUFFER_SIZE (300) float buf; char inChar; float num; float adc_volt; void setup() {

I use HC-05. It seems it there is higher baud rate possible (1382400 baud rate?) https://www.instructables.com/Modify-The-HC-05-Bluetooth-Module-Defaults-Using-A/ Floats are numbers from adxl accelerometer and 24...

Teensy is waiting for char and then starts sending array via bluetooth. I fill array by some numbers and then I want send all array via bluetooth Serial1.write((char*)buf, sizeof(buf)); I can setup higher...

Now I use this code and it works if I send data in loop. But not if I send data as array (buf): #define BUFFER_SIZE (30000) float buf; char inChar; float num; void setup() { Serial.begin(9600);

OK, thanks! Now I have continue with my Python code to read bluetooth and decode binary data.

Yes, you are right, I want to send float values. If I use your code, I can see on my mobile just "971310a" With this code I can see floats on my mobile but seem quite slow. String data; #define BUFFER_SIZE ...

UPDATED code but same issue: String data; #define BUFFER_SIZE (100) String buf; void setup() { Serial1.begin(9600); for(int i=0; i<BUFFER_SIZE; i++) {

I am testing this code: #include <SoftwareSerial.h> #define RX 0 #define TX 1 SoftwareSerial sserial = SoftwareSerial(RX, TX); String data; #define BUFFER_SIZE (100) String buf;

I use Teensy 4.0. On the other side will be Python - but I am working on code now. So I am testing with mobile. I will use https://github.com/pybluez/pybluez

I am working with this basic code. For testing I am trying terminal on my mobile but I see only nonsense letters. Tomorrow I will have bluetooth adapter for my PC. #include <SoftwareSerial.h> SoftwareSerial...

If I undestand well (not sure) I have to add capacitor and resistor between power of ADS / ADXL and GND = Capacitor will be connected between 5V and GND. Is that correct?