Questions tagged [hat]
A "hat" is an add on board designed specifically to fit on top of the pi via the GPIO header. They have a small EEPROM chip which is used to configure them, but may be built to serve any purpose.
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Using 3 SIM800c GSM Hat on 1 raspberry pi 3b+
My goal is to control at least 3 SIM800c hats using just one RPi but I'm not quite sure it will work.
How will Rpi reference each hat?
Can each hat make a call of their own?
For reference:
How to ...
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3answers
1k views
PoE hat fan activation on OS other than Raspbian
I'm aware that the only officially supported OS that the PoE hat works on is Raspbian. I can confirm that both my hats work, and that the fan does switch on and off if I have Raspbian installed on the ...
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2answers
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How to make ups hat run safe shutdown on raspberry when disconnected from the power source
It can be long discussion, because there is no single solution around this, so, to cut the story short, I will tell where I stuck on my way.
It is AndroidAuto (media centre in car on raspi) project I'...
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1answer
91 views
Can I use a DHT22 sensor with the servo hat installed on my RPi-3?
the title pretty much says it all...
My son an I are doing some robotics experimenting with the RPi-2 and RPi-3, we are using the Servo Hat to control several servos on them.
We would like to ...
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1answer
209 views
Finding EEPROMS suitable for HATs
I'm working through the HAT design guide to work out what kind of EEPROMs I can use.
To quote it:
24Cxx type 3.3V I2C EEPROM must be used (some types are 5V only, do not use these).
The EEPROM must ...
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1answer
878 views
Waveshare SIM7600E-H no wwan0 interface when connected to Raspberry Pi 4 model B
I have connected the new Raspberry Pi 4 model b with the waveshare SIM7600E-H 4G HAT.
The os is Raspbian Buster Lite.
The configuration I use is the following:
1) The jumpers are placed in the middle ...
0
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1answer
394 views
Problem with HAT GSM/GPRS/GNSS/Bluetooth
I have:
Connected rasspbery pi zero with HAT GSM/GPRS/GNSS/Bluetooth by
gold-pins.
List item
Switched UART to B-position Raspbian version: 9 (stretch)
When I used pwdrkey i have only PWR and STA ...
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2answers
30 views
Regular servo vs. Linear servo
I was wondering if there was any difference between controlling a normal rotating servo and a linear servo with the raspberry pi. Would the code look essentially the same? I'm trying to build a device ...
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2answers
305 views
sense hat sample “snake” returns “event device not found” error
My "sense hat" sits ontop of a raspberry pi 3. I've completed the installation instructions found at https://www.raspberrypi.org/documentation/hardware/sense-hat/
lexu:~> sudo apt-get update
lexu:~...
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0answers
21 views
Raspberry Pi FlexRay HAT [closed]
I've been searching for a couple of days for a FlexRay HAT / module for Raspberry pi without success.
Is there such a module available?
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1answer
206 views
How can Rpi4B python use USB Serial AT commands to control a 4G/LTE MiFi modem to text SMS?
I have purchased this 4G HAT and I'm using it with this module in a raspberry 4. I use the USB connection.
I installed a ppp connection and everything is working correctly. My problem is: how do I ...
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0answers
35 views
Inky pHAT compatibility issues with Raspberry Pi 4B
I've bought a Raspberry Pi Model 4B for a few different projects, one of which is to use an Inky pHAT display (as seen on The Pi Hut) on it.
When the display arrived, I attached it to the Pi's GPIO ...
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1answer
77 views
How to detect list of available sensors and actuators reside on a HAT?
I have been working with many HATs along with Raspberry Pi such as Sense HAT, Pimoroni Enviro pHAT; and so on. However, HATs report its existence to the device tree in /proc/device-tree/hat and /sys/...
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1answer
379 views
WaveShare WM8960 Audio Sound Card / HAT Installation on Rpi Zero W Problem
I recently bought the WaveShare WM8960 Audio HAT said compatible with Raspberry Pi Zero W.
The install complete without trouble, I can see that the soundcard is installed by typing
sudo dkms status
...
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2answers
1k views
Cirrus Logic Audio card replacement for recording
As is probably well known the Cirrus Logic Audio Card has stopped being manufactured and as such is proving very difficult to get. My reasons for wanting this card was that I needed something with a ...
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1answer
92 views
Audio Injector stereo soundcard is preventing boot
I recently bought a Audioinjector stereo soundcard HAT to stream sound on my raspberry pi running Raspbian. I went to their website and installed the .deb installer file and ran it with audioInjector-...
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0answers
771 views
SIM7600 4G HAT Rpi3B+ Setup Problem
I am trying to get a SIM7600E-H-4G-HAT running on my Raspberry Pi 3B+, but it is not working. Here is what I've done so far:
Inserted my SIM-Card, connected the antenna to Main, connected the entire ...
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1answer
73 views
Outputing DMX using Bitwizard Hat
I have a Raspberry Pi 4B with a Bitwizard DMX Hat which uses the serial port. I try to output DMX from the board to a LED light using QLC+ software, but it's not working. I tried some commands and I ...
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1answer
112 views
Multiple Hat and GPIO
I need, for a project, to connect on the same RPi (a 3B+) a NFC lector, the Sense Hat and also be able to use 26 GPIO port for additionnal LED and button. The project is a kind of a physical "Keep ...
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0answers
44 views
Using GPIO on the Bitwizard DMX hat board
I have a rpi 4, with a relays board on top of it, and a Bitwizard DMX hat board on top of that.
The Bitwzard board doesn't have a male header on the top, so I am unable to connect my sensors. It was ...
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1answer
3k views
arecord throw Input/Output error
When trying to run the following command, I am getting Input/Output error
pi@raspberrypi:~ $ sudo arecord -Dhw:1,0 -d 10 -f cd -t wav test.wav
Recording WAVE 'test.wav' : Signed 16 bit Little Endian,...
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1answer
61 views
Process to select and stack a relay HAT and a touch-display HAT
The goal is to design thermostat system via stacking Raspberry pi HATs:
Raspberry pi (3B+ or 4)
4-channel relay
TFT Touch Display
It would be preferable that community experience point out any ...
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1answer
370 views
Stepper Motor Hat v0.1 - pre-soldered version
I am pretty new and have installed the referenced HAT. I followed the instructions, but it is not detected.
I have power and a green LED on the board and when I turn it on and off the servos jump a ...
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2answers
2k views
How to detect what kind of HAT or GPIO board is plugged in - if any?
I am setting up some Raspberry Pis for use in demos to colleagues, in order to show off capabilities of the Pi itself, and of some of the add-on boards that are available.
I would really like to be ...
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0answers
23 views
Can I use a Pi Sense HAT and motor HAT together?
I have a Raspberry Pi 4 and I'm wondering if it's possible to use the sense and motor HATs together ( preferably stacked )?
These are in the following links:
https://thepihut.com/products/raspberry-...
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2answers
5k views
Why does the Sense Hat / Astro Pi show the wrong temperature and humidity?
I recently bought the sense-hat, previously called astro-pi.
Unfortunately the temperature shows 28 to 31 degrees Celsius from both temperature sensors on the board. They often show around 30 degrees ...
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0answers
97 views
Is it possible to connect two waveshare SIM7600E-H lte hats on the same raspberry pi 4?
I have a raspberry pi 4 model b connected to a waveshare SIM7600E-H 4g hat.
The connectivity is the following :
1) I have the jumpers in the middle position
2) The shield is connected onto the RPi ...
3
votes
1answer
3k views
How to use a GPIO pin after I put on a HAT?
I got a Speaker pHAT for my Pi Zero. According to the pinout, it only uses 5 GPIO pins, so plenty of room to add something else.
The problem is, I'm not sure what's the best way to physically attach ...
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0answers
40 views
Are there plans to make a RPI 4 PoE Hat that matches RPI4 power specs?
The RPI 4 draws up to 3amps at 5.1V. The official PoE HAT outputs 2.5 amps at 5V. Generally this should be enough but I'm curious if a higher spec PoE HAT for the RPI 4 is planned? If not can one be ...
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1answer
40 views
Is there a way to have USB data transferred from Pi to HAT?
I'm designing a Raspberry Pi HAT that requires USB for debugging. The 40-pin GPIO connector that connects the Pi to the HAT doesn't seem to have any USB designated pins. I would like to use the USB ...
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0answers
48 views
Do the PiJuice and SenseHat HATs clash?
I have two hats a PiJuice UPS and a SenseHat. The GPIO pinouts for each are https://pinout.xyz/pinout/pijuice and https://pinout.xyz/pinout/sense_hat respectively.
When I stack my SenseHat onto the ...
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0answers
77 views
Servo and DC/Stepper Motor Hats Together
I am creating a robot with my Raspberry Pi 3 B+. For my project, I wish to use 2x NEMA 17 stepper motors for moving around, and 2x SG90 servos for managing pan/tilt of the head.
I already have an ...
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1answer
330 views
How to use a stackable Rpi relay HAT to control 220V AC mains power?
So I want to wire two DHT22 sensors (5V) to a Pi and also control a lightbulb with 220V. As a plus this should be very compact and I don't want to solder or use breadboards/jumper cabling.
I looked ...
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1answer
199 views
Supply 5v to peripheral using solder pads and not GPIO?
This seems like a simple enough question but it hasn't been easy to find an answer!
I have a Pi3 (with recommended PSU), official screen, official camera and I've now added the respeaker 2-mics Pi ...
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0answers
29 views
Distorted sound using VOIP and ReSpeaker HAT
I am using the ResSeaker HAT on my raspberrypi 3. After installing the drivers im able to record the sounds using the inbuilt mic and play it from my speakers (using the command arecord -f cd -Dhw:1 | ...
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0answers
25 views
respeaker HAT and voip using raspberrypi
I am using the respeaker HAT on my raspberrypi 3. After installing the drivers im able to record the sounds using the inbuilt mic and play it from my speakers (using the command arecord -f cd -Dhw:1 | ...
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2answers
202 views
Sixfab LTE IOT HAT throwing continuous AT Command
I was working on getting my new Raspberry Pi HAT that I have received and tried the simple example just to see if it is working fine. I have not been able to send a text message to my mobile phone.
I ...
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1answer
32 views
Does a hat designed for RPi 2 B still work on Rpi4 (GPIO compatbility)?
I'm now continuing the design of a PCB (Pi Hat) that I started with a RPi 2 Model B.
Will a RPi4 accept this hat?
TL;DR: Does a RPi4 accept a Pi Hat designed for RPi 2 B? Or is there a break in ...
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2answers
178 views
USB ports on USB hat not recognised
I have a setup that uses 4 USB cameras, a USB cell modem and a USB weather station. I deal with this by adding a powered USB hub. I just bought a Waveshare USB hat which looked like a tidier solution. ...
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1answer
57 views
Is my ClusterHat faulty or my RPi GPIO fried?
I've been using a ClusterHat (1RPi + 4 PiZeroes) and all has been well until recently.
The PiZeros boot off the RPi's SD card using the ClusterHAT-2018-10-09-lite-1-usbboot boot image, and when I ...
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1answer
585 views
Stacking multiple TV hats
Is it possible to stack multiple TV hats on each other?
I would like multiple users to watch TV channels on different frequencies (MUXes).
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111 views
Cooling Fan Hat?
The PoE hat has a built-in cooling fan, and even has drivers in Raspbian to automatically turn it on and off based on the CPU temperature.
However, any guides to add a temperature-controlled fan seem ...
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3answers
852 views
GPIO relay signal cross turns to all relays staying on after Darlington added
I have 4 Sunfounder 2 channel relays 7 of which that I'm using to control some things on my aquarium. I suspect that I may have wired them up wrong somehow though. The behavior I'm seeing is as ...
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1answer
607 views
No module named 'adafruit_circuitpython_servokit' [closed]
I have a Adafruit PWM hat and I am trying to run play around with some servos. However, when I run this line:
from adafruit_servokit import ServoKit
It returns:
No module named '...
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0answers
498 views
setup wifi hotspot with 4G hat [closed]
I have bought a 4G hat for my raspberry pi 3B+ (the sim7600 waveshare for europe) and followed these instructions for setup. It is running the latest version of raspbian and I have internet on the ...
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0answers
123 views
Are there any battery backup options that work with a PoE powered Pi?
Looking to have a Pi (4) that is powered over PoE - are there any battery backup options (i.e. hats) that can be stacked with the PoE hat & supply power if/when the PoE fails (and then re-charge ...
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1answer
286 views
Waveshare SIM7600E-H no internet connection
I don't know why i'm not able to connect to the internet with my HAT. Maybe i'm doing the connection check wrong, because i'm always getting Error when i test a ftp connection.
I'm getting following ...
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1answer
946 views
Waveshare GSM/GPRS/GNSS HAT not connecting to Cellular network
I have this HAT i bought for a pi project I am working on. I get the device to power on, I can connect via USB from PC, and can connect from pi too.
However, the NET LED just blinks every second, ...
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1answer
686 views
Pi HAT Waveform Generator for Raspberry Pi 3B+
I am looking for a Pi HAT capable of generating 300 kHz sine waves at about 8 samples per waveform with my Raspberry Pi 3B+. Sampling rate required is around 2.5 MSps. Output voltage ideally needs to ...
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0answers
278 views
Are HATs not supposed to be stackable?
From reading the HAT spec, the ID EEPROM is fixed at address 0x50. This implies that only one real hat may be present at a time, yet lots of products are called HATs and say that they can be stacked, ...
