Can I connect thermistor sensor to the analogue pin of XBee to read the human body temperature?
I want to get human body temperature through XBee.
Yes you can read temperature from a temperature sensor that is integrated with xbee but you also need another xbee that is connected to another microcontroller to read these values that are sent.
Related
I'm using PIR sensor for motion detection and XBee s2c for transmission. The remote(transmitting) XBee, connected to PIR, is configured as below
CE=0
DH=0
DL=0
D4=3
IR=3E8 (500ms)
IC=FF (Change Detection on all pins)
The base(receiving) XBee is configured as below
CE=1
DH=0
DL=FFFF
D4=5
At the base, GPIO4 is connected to an LED. I have performed a simple test as mentioned here to check whether the GPIO is working or not. It's working as mentioned with above given DH & DLs. As D4 is configured to 5, the LED glows all time. Theoretically, whenever PIR sends high, LED should be off and vice-versa. But I am having two problems
The console of remote XBee is not showing any frames being sent but console of base XBee is showing the receiving frames and it is receiving correct data of PIR.
The pin D4 of base is not following the data being received i.e, it stays high all time.
I have observed the frames being received and they are showing the response of PIR as intended. How is the pin D4 not following the frames being received? I have followed this tutorial for DIO lines passing of XBee.
Make sure you're running the 802.15.4 (ATVR=0x20XX) or DigiMesh firmware (0x90XX) and not the ZigBee firmware (0x40XX). Looking at the options in XCTU, I don't think ZigBee firmware supports I/O line passing.
And looking at that knowledge base article, you might need to set ATIT on the remote and ATT4 and ATIA on the base. If those registers aren't available, then you're probably running a firmware version that doesn't support I/O line passing.
I want to know about project related to temperature sensor , like the temperature 80 degrees is sensed the it will send signal to FPGA and it should display "error" into seven segment display. and temperature sensor is connected to one machine and FPGA is connected to the generator, both the machines are connected to each other though for supply voltage. how to integrate both?? Please help...
I created a WP8 App. It connects to the Bluetooth and detected it.and the Bluetooth module connected as well. But the data are not coming from the Arduino to the phone :(
error code
if(btSerial.available()) {
Serial.println(distance);
btSerial.write(distance);
}
else {
Serial.println("error"); -> always prints this
}
in the code always the error part is printing in the serial monitor. I have attached the pins in the Bluetooth device to below pins.
RXD - 11,
TXD - 10,
GND - GND,
VCC - 5v,
Please help me why is btSerial.available() is not firing ?
You have the logic backwards. available() tests whether the Arduino has data in its receive buffer. It does not test if the connection is ready. So the overall pattern of a serial program
if(someserial.available()) {
someserial.read... loop to get input
print stuff received
}
To write, just write.
//no if's just go
someserial.write("my output")
You do not need to wait. With the two wire serial connection, you have no flow control. In other words, there is no signalling between arduino and bluetooth transceiver about ready or other status. Because the baud rate of the bluetooth link exceeds the baud rate of the arduino serial link, you can't really overflow the bluetooth transmit stream.
The bluetooth aspect of negotiating the connection is meant to be transparent to the Arduino. In other words, your program is the same as if you where using a hardware serial port. If for some reason, you need details into the connection, there are special byte sequences that allow communication with the bluetooth hardware.
I am new to Arduino and I have 2 issues when I tried the BluetoothShieldDemo.
I can only send data from bluetooth module(through serial monitor) to phone but I cannot send from phone to bluetooth module(to display it in serial monitor). I used oscilloscope to check there is signal in the Arduino board RX pin but no data display in the serial monitor. I suspect it is an IO issue so I changed the IO from digital pin 6 and 7 to digital pin 2 and 3, then digital pin 4 and 5. But it is still not working. Then I change the code to use hardware serial (Serial1) and it is working now. I just wonder why it is not working with the SoftwareSerial.
Although I can send and receive data, I cannot change the bluetooth name. The bluetooth module has no response when the below commands are sent. Is it the bluetooth module is in some kind of locked mode? Or the command is different from manufacturer? The bluetooth module that I got has a single CSR 31A2 chip on it. But the other shield that I saw on the web has 2 chips and it is with CSR BC417.
Codes:
blueToothSerial.print("\r\n+STWMOD=0\r\n");
blueToothSerial.print("\r\n+STNA=BluetoothSlave\r\n");
blueToothSerial.print("\r\n+STOAUT=1\r\n");
blueToothSerial.print("\r\n+STAUTO=0\r\n");
delay(2000);
blueToothSerial.print("\r\n+INQ=1\r\n");
Thanks in advance!
1- When using SoftwareSerial, how are you declaring the pins (Input/Output)?, Are you pulling serial data right (giving it enough time between data transmission, but reading at the right time)?
2- Find the datasheet of your module and see what commands does it support.
I use Arduino for comunication between sensors and my C# application using a serial port. Is there any possibility to access digital components directly such as Force Sensitive Resistor - Square, from a USB port?
Do I have to write a driver for that?
I drew a semi-schematic diagram to exemplify:
There isn't a way to directly read an analog sensor over USB since it's a digital bus. You need some sort of processing to convert the analog signal to digital and communicate over the bus properly.
In order to sample information from any sensor, you will need an intermediary. The Arduino uses an FTDI chip to convert UART (Serial) to USB. When you read data over this connection, you are reading it over the Serial over USB interface. My recommendation is to stick with using the Arduino or other micro controller.
If you are really bent on reading it Directly over USB (instead of through the Serial over USB converter) you would have to implement some sort of protocol in a device that supports USB such as the Stellaris Launchpad or an Atmega32U4 AKA Arduino Lenardo. You would also have to write a driver to describe how to communicate with this USB device. Unless you were able to implement it as an already known device such as a keyboard or serial port (Yep, we went full circle there).
In short, there's no already made chip that converts Analog (or Digital) values from a sensor into something any OS would natively understand. Since USB is a protocol much like IP, you're not going to be able to use discreet devices. You're going to have to use a micro-controller with a USB stack.
Again, my advice would be to pass the sensor values over USB through the existing Serial (over USB) port. This is pretty straight forward and easily reproducible without an entire Arduino.
From the looks of the force-sensitive resistor, this is an analog component; the resistance and capacitance changes with the force applied to the sensor. If you check out the FSR installation guide document there are suggested electrical interfaces starting on page 16.
I would recommend the first circuit, connect Vout to an analog input on the Arduino. From there you will need to convert from ADC counts to voltages and then use a lookup table function in the Arduino to convert from voltage to force according to Figure 9. At this point you have a variable containing the force applied to the sensor. From here you can transmit the value over the USB serial bus just like any other value. Your C# application then needs to read the serial data, and parse out the value.