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i am working on a project and i don't really now how to handle this one.
So i have raspberry pi with nrf905 connected to it. It's purpose is to send data via radio.
Also there is arduino M0 board that serves as a reciver with it's own build in radio module. It should also print recived data in serial monitor. Any tips on how to start? Frequency must be 433.0 MHz, bandwith 125kHz.
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I wrote a program to control 5 servos through a web server, The Arduino sketch should display the URL to the webserver that is used to control the servo motors but when I open the serial monitor It does not display anything.
Here is the sketch
I've tried different baud rates but the specified rate for my ESP8226 Node MCU is 9600. Any help is appreciated
You've got to give us more information about the issue. In your setup you print
Serial.print("Use this URL to connect: ");
Serial.print("http://");
Serial.print(WiFi.localIP());
delay(1000);
Is this the section of code you are experiencing a problem with? Do you see any output at all on the Serial monitor?
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I would like to use a BLE temperature sensor (such as the Inkbird IBS-TH1 Mini BLE Sensor), however, I want to be able to display the temperature measurements in my own website. To do this I am planning to have an ESP32, which would intercept the temperatures sensor's BLE messages (and then send them to Firebase Realtime Database via WiFi). I know how to use the ESP32 to find advertising devices, however, I am not sure how to receive the measurements the sensor is transmitting. I have seen libraries such as the ESPHome or ESP32-mqtt-room, but I was wondering whether there is a way to bypass them? Is it neccesary to use mqtt or mosquito? Or is it possible to achieve this using solely the Arduino BLE library?
Any help would be appreciated!
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I need to findout the distance between Wifi routers and devices connected in that Wifi. The Wifi is an open wifi, so there can be n connection.
The distance have to be tracked in wifi router not the device. Is it possible to do the same? If so then how?
Can we write a program and set the custom router for the same, if so, how can we achieve it?
Thanks,
Nikhil
If the router is linux-based, you may for example develop a simple C application periodically fetching iw dev <your_wlan_interface> station dump command output. this command lists all devices currently connected to "your_wlan_interface" and contains signal strength information as well.
Converting signal strength to the distance is another task to solve and in my opinion it is quite clearly described in the link provided
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I am supposed to work on project which involves communication between 2 GSM 900A modems. The main idea is to acquire data in remote location through Arduino (Arduino Mega in my case) and transmitting the data to the Server which will be my laptop, in which that communication part i use 2 GSM 900A modems. I am new to GSM modems so could you please help me with your ideas for establishing communication between 2 modems..
I posted a blog on this topic which is given below. I think it may be helpful for you. link:http://www.jellyfishtechnologies.com/category/embedded/
GSM modems do not follow a common standard, although the command set does tend to be a superset of Hayes AT. You will need to refer to documentation and development kits for your particular devices.
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How can I use internet on my phone with GPRS when my sim is actually GSM and the two are different technologies.
Your SIM card have nothing to do with technology used for data transfer.
SIM only contains identification of subscriber (Subscriber identity module) and maybe some auth/encryption process (A3/A5), thus it's on modem, if is capable with GPRS/EDGE/HSDPA (and of course operator's network)
Only thing to note is the "phase" of your SIM card.
However, it's only information, with which extension is your SIM capable.
You can read ETSI TS 131 102 or ETSI TS 121 111 documents for some details, there are available on http://www.etsi.org