node-dht-sensor broken on RPI4
jgarvey955 opened this issue · 9 comments
After updating to buster on my RPI3B+ my system was running fine. All other peripherals work fine except the DHT11 and when i shift the 3B+ out for the 4B i get an 2835 MMAL error saying that memory can not be mapped. when i swap the 4B back to the 3B+ it runs fine. Is there something new???
- Error is
bcm2835_init: gpio mmap failed: Cannot allocate memory
Segmentation fault
Have verified DHT11 works with RPI4B through a python script. Am currently on node 12.6.0 - am going to try to drop to latest stable 10.15.2 and see.
Have verified same issue with node 10.15.2
We had a similar problem reported in #16.
Perhaps you can run a simple test code (e.g. the First Example from the README file) to confirm if you still have the problem.
I have confirmed with Raspberry Pi Org that the bcm2835 library will need to be rewritten for the rpi4b due to changes with the chip.
Thanks for the update @jgarvey955!
How would you use this library with the new bcm2835 1.60 version? Is an update of this library needed?
I have the same problem. Is there any workaround?
I am experiencing the same issue. I am using DHT22 and raspberry pi 4.
Due to the limited availability of the RPi 4 I have been unable to work on this issue. If any lucky owner of a RPi4 is interested in working on this issue it will be most welcome! If not, I am stuck waiting for my order to be fullfilled, hopefully soon.
Excited for the update! This is my current workaround
Fix for running node-dht-sensor on the Raspberry Pi 4 is now released.
Please make sure you upgrade to version 0.4.0 and check if it works for you.