Components:-
Raspverry pi 3,
Temperature sensor DS18B20,
LCD display screen.
I am trying to create a simple program that gets the sensor values and shows the output on display screen connected to rpi.
But, I require some more information of the sensor such as 'manufacturer details, model number, type of sensor, etc.' Is there a way to get these details?
I want the details to be shown as soon as the sensor is connected to rpi.
Please help!
Related
I'm trying to transmit MPU6050 sensor readings to my computer via virtual comport.I'm using STM32 Nucleo F446RE. As far as i can see in debug mode there is no issue in sensor and sensor readings. Problem is I can't transmit them using USB. Are there anyone who have experienced this issue before?
In the tutorial I watched the guy can transmit sensor reading with USB port and can see them with a serial port reader program. I'm sure that there is no issue in sensor the card sees sensor. I don't know why it keeps returning USBD_BUSY.
Transmit Code I'm using
I have a bit of a niche question, we have a game designer who has made a small game to run on a raspberry pi, this has been coded in 'gdevelop'.
Is there any way to get this code to send a 5v signal from the raspberry pi, we need a certain point of the game to send a 5v signal to trip a relay.
I don't currently have the code for the game but will hopefully receive it soon.
If this isn't possibly, would we be able to set the raspberry pi up to recognise the controller inputs, track them and send the signal upon the correct sequence of movements inputted simultaneously to running this game code.
The developer has said he plans to save the game as a windows exe on the pi with auto run enabled so one the pi is reset the game automatically starts up and sits waiting the input to begin.
Many thanks in advance and let me know if you need further information!
I am creating a simple car dashboard cluster using a Raspberry Pi 4 with a 7in screen and using an 8 channel ADC hat and the GPIO pins for sensor input.
The GPIO pins will be used to read the state of various switches in the car using a step down converter so that when a switch is on 12v from that switch will be converted to 3.3V and send to a GPIO pin so it will be high.
The ADC will be used to read the values of various 5V sensors in the car like oil pressure, coolant temp etc.
The screen is a basic HDMI 7in screen with the Pi mounted behind it and I plan to 3D print a new gauge cluster bezel to fit everything into the stock location. I have a Mausberry power controller so that the Pi will turn on with key on and turn off again with key off. I have modified the Pi so it boots from SSD and starts up pretty quickly.
I have used simple Python programs to read the data from the ADC over i2c and the GPIO pins and output it, no issues there. I have found a nice Javascript based library called Justgage which looks like a great way to display my data in a simple HTML page and have designed my page layout with the various gauges and lights that will eventually have the data read from the ADC or GPIO pins.
What I need some advice on is how best to architect the overall solution, I have all the various parts but need to integrate them. I want to minimise the amount of software running on the Pi so it boots quickly.
At the moment when the Pi boots it auto loads Chromium and opens my page I have created but I need a method to be able to read the i2c and GPIO data and then refresh the elements in the HTML page. The Justgage library supports refreshing the data so that I don't have to refresh the page and would like a method to read the data every second or so and then call the Justgage refresh function.
All the examples of this sort of model I can see online use a webserver running on the Pi but as the screen is directly connected to the Pi I don't actually need a webserver and would like to minimise the amount of software running for reliability and boot times.
Sorry for the long first post and appreciate any guidance. Happy to post the HTML if that would be of any help.
Cheers
Matt.
I am using a Raspberry Pi 3 B model with a Grove Pi+ (1.2.2 firmware), and Raspbian for Robots Image.
I have plugged in the CO2 MH-Z16 sensor in RPISER port, and I am trying
to execute the code that is available in Dexter's Github
I am getting the following issues:
First time I tried the code, it was working but it was getting very strange results, always out of range and strange temperatures.
It calls the sensor every 18 second.
Now, when I plugged-in the sensor in de RPISER port (with the rpi on), the raspberry pi get frozen. If I tried to restart it, it is not restarting until the sensor is plugged out the rpi. I do not know what is going on, and how to solve this issue. Sometimes, the rpi does not get frozen but the mouse and the keyboard suddenly stop working. If I try to restart the rpi whith the sensor, the rpi is not restarting, it get stucks.
Can I use this sensor in another port?
Any help or any hint?
Oh yes update your firmware. I also took a long time..
https://www.dexterindustries.com/GrovePi/get-started-with-the-grovepi/updating-firmware/
I registered my Raspberry Pi with IBM Bluemix successfully . It has dht22 temp and humidity sensor connected to it and running.
Question: While building Internet of things starter app , do i need to code anything on Rpi to push that sensor data into Bluemix or simply providing the MAC address and the API will do the trick?
Note: I followed a recipe to configure my Raspberry Pi , registered with the MAC address. It is connected and sending messages when i check in the device.
Kindly let me know if i need to do any other configuration or coding to send specifically my dht22 sensor data to visualize in Bluemix and use it in Node-red.
By default Raspberry Pi recipe sends only the CPU temperature and CPU load. As there are no sensors present in Raspberry Pi by default, the recipe uses parameters like CPUTemp and CPULoad.
In your case, you will need to update the code to include dht22 temp and humidity parameters to be sent to IoTF(Bluemix). Please check the code in Github for the raspberry Pi recipe - https://github.com/ibm-messaging/iot-raspberrypi
Navigate to samples/c for the recipe code. You will have to gather the dht22 sensor data and convert them to JSON and send it to IoTF.
In the iot.h, update the json struct to include your sensor values. You can remove the cputtemp and cpuload parameters if you dont need them.
In iotmain.c, line 152 update the code with the code to gather the dht22 sensor values.
In jsonator.c, update the new sensor values based on your new struct.
Then follow the steps provided here to compile the code and install the new deb file. Now the iot service will send data with dht22 sensor values.
If the Bluemix IOT console is showing the that the device is connected and sending data then you should not need to do anything more on the Raspberry Pi.
You will need to bind the IOT service to your Node-RED instance (assuming you are running Node-RED on Bluemix) to access the data.
I believe the recipe you used was this one: https://developer.ibm.com/iot/recipes/raspberry-pi/
Per the readme in the source code, the events that are emitted in this sample are:
CPU temperature
CPU Load
Simulated Sine wave to demonstrate the different events can be pushed to IoT Portal and visualized.
If you are trying to capture other items such as humidity you may need to create additional code/logic.
I have an ansible role to register raspberrypi, fyr
https://github.com/reachlin/fangge/tree/master/ansible/roles/iot
You have to replace your credentials in file defaults/main.yml
ORG:xxx
TYPE:xxx
ID:xxx
AUTH:token
TOKEN:xxx