Raspberry Pi Forums

Bosse_B

OK, that is what I figured too. It was really tedious work capturing the packets with the oscilloscope and then manually inspecting the waveforms for 1 or 0 values. I made 13 such deconings without being wiser except for the channel indicator bits I found inside the packet. If I had designed the pac...

Bosse_B

I planned on doing the detective work on the Pi but then porting the results over to Arduino using the ESP8266 WiFi module as target. The ESP is already present serving wired sensors (3 of them) but I cannot get access to install more sensor wires anymore, the construction is now closed up too much....

Bosse_B

Bump, double post edited

Bosse_B

I have hooked up the receiver on a breadboard now and connected an oscilloscope to its output. The situation is as follows: Whenever nothing is transmitting the receiver outputs a lot of noise. When I activate the Tx button on the temp/humid sensor the data on the receiver output stabilizes into a b...

Bosse_B

Which is your problem To get the raw data stream into the RPi or to decode that into readable figures? If the latter then AFAIK there is no standard encoding used by all makers of sensors and stations. Getting the raw output into the Pi is just a matter of hooking the receiver output to a suitable ...

Bosse_B

I want to read the output (temp + humidity) of a couple of weather station sensors which use the 433 MHz frequency. I have a receiver like this: 433MHzRx.png The sensors are from a weather station (no brand except for the chain tha sell them) and they can be bought separately at a low cost. The labe...

Bosse_B

I do actually believe that importing old csv or svn repos into git is the preferable way to go. I also liked to the official documentation in case that was not an acceptable solution for some odd reason. Not a use case for organizations that have used CVS for many years and utilized the various "ad...

Bosse_B

Please point the email links to the real forum URL:s instead of the other one!

Bosse_B

In that case why am I not logged on automatically? Really suspicious looking.

Bosse_B

Today I got an alert email on a response to my over two years old thread about installing CVS on an RPi box. But when I click on the links in the email I am getting to a login page at a location I don't recognize at all (I have stripped off the ending URL part): https://lb.raspberrypi.org/forums/vie...

Bosse_B

Did you note the time stamp of this thread? More than 2 years old....
Using Subversion now.

Bosse_B

I have now modified my electronics box such that I added a 5V linear regulator to get a 5V supply for the sensors. So I changed the connection for the sensor power to this 5V from the 3.3V I used before. On each sensor line I also added a 1K pullup resistor to 5V plus a 3.3V zener diode to ground to...

Bosse_B

Read some more about BME280 sensors... Caveats: 1) I2C bus is a short range system, some pages suggest maximum 50 cm cables and I have 10 m distance... 2) The BME280 has a fixed address that can be hardware modified on one bit giving two possible addresses only. 3) It seems like the sensor boards ar...

Bosse_B

Thanks for the suggestion! My system uses 3 sensing points installed in the attic with up to 10m long 4-wire signal cables. The cables were put in place when the new roof was built in April and now only the end points are accessible through small hatches, so I am stuck with what I have... With the c...

Bosse_B

I have set up a monitoring system for my attic to check for excessive humidity (which could cause mulch developing). So I have wired 3 AM2302 DHT sensors at each end of the attic (20 m long) and the middle (where the electronics box resides). Readings are taken each 60 min and sent to my website MyS...

Bosse_B

And yesterday I disabled (using sudo raspi-config) the 1Wire, I2C and SPI interfaces, which I previously enabled because of the instructions on this webpage . After this I switched back the cron job to using GPIO4 and waited. Turns out that now the RPi has performed a reading every 30 minutes for ov...

Bosse_B

I have switched GPIO pin to use GPIO17 instead of GPIO4. Now the logging is not giving up, so it seems like GPIO4 (which is also used by the 1wire system) is not usable. At least not when 1wire is enabled.... The cron job has successfully operated every 30 minutes over night and across a scheduled R...

Bosse_B

I thought that the problem was fixed by running the call to the py script as sudo (from AdaFruit's installation page), but unfortunately this was not the case. When I checked the log file I found that after a few successful measurements the DHT seemed to have locked up again and there was no output ...

Bosse_B

Is it needed for the Adafruit DHT interface?
Is it somehow outputting data during boot that can lock up the DHT sensor?

Bosse_B

I have discovered a strange problem with a sensor I am deploying to my summer home in order to monitor temp/humidity over the winter. I have an RPi3 with the Adafruit_Python_DHT library installed and it worked just fine yesterday. Now following the nightly reboot of the RPi it has stopped working , ...

Bosse_B

OK, so I did not wait long enough... It turns out that after 39 s the call: ./AdafruitDHT.py 22 4 returns with an error message: Failed to get reading. Try again! Now I just need to figure out how I can set up a script that will log readings on a regular schedule with both a timestamp and the result...

Bosse_B

I have a bunch of AM2302 sensors primarily used with ESP8266 WiFi modules as temp/humid sensors. Now I need to interface to an RPi3 and I found this webpage describing it all. I followed its directions on two RPi3 units with different versions of Raspbian and it seemed like the Adafruit_Python_DHT s...

Bosse_B

iptables-save shows this: *filter :INPUT ACCEPT [15584849:2706590795] :FORWARD ACCEPT [1832370:466329194] :OUTPUT ACCEPT [6935632:558888964] -A FORWARD -s 10.8.0.128/25 ! -d 10.0.0.10/32 -j DROP -A FORWARD -s 10.8.1.128/25 ! -d 10.0.0.10/32 -j DROP COMMIT # Completed on Sat Sep 29 14:31:26 2018 # Ge...

Bosse_B

This thread is 8 months old (since last post) and the issue has been resolved. I ended up limiting the client IP range for these users to access only a single LAN IP address. I used IPTABLES for that. The users are identified by ccd entries where they get IP addresses in a different subnet (with the...

Bosse_B

Thanks, I will try to use that.
But my preferred programming language is Pascal (as in Free Pascal /Lazarus) so do you know of an interface using Pascal?

Search found 836 matches

Re: How to read weather station sensor over 433MHz?

Re: How to read weather station sensor over 433MHz?

Re: How to read weather station sensor over 433MHz?

Re: How to read weather station sensor over 433MHz?

Re: How to read weather station sensor over 433MHz?

How to read weather station sensor over 433MHz?

Re: How to install CVS server on a RPi3?

Re: Bogus raspberry pi forum alert email??

Re: Bogus raspberry pi forum alert email??

Bogus raspberry pi forum alert email??

Re: How to install CVS server on a RPi3?

Re: AM2302 DHT sensor ignoring sign of temperature....

Re: AM2302 DHT sensor ignoring sign of temperature....

Re: AM2302 DHT sensor ignoring sign of temperature....

AM2302 DHT sensor ignoring sign of temperature....

Re: AM2302 DHT sensor on RPi3 not working after reboot of RPi

Re: AM2302 DHT sensor on RPi3 not working after reboot of RPi

Re: AM2302 DHT sensor on RPi3 not working after reboot of RPi

Re: AM2302 DHT sensor on RPi3 not working after reboot of RPi

AM2302 DHT sensor on RPi3 not working after reboot of RPi

Re: AM2302 Temp/Humid sensor, improvement needed...

AM2302 Temp/Humid sensor, improvement needed...

Re: OpenVPN - how to limit client access inside target LAN?

Re: OpenVPN - how to limit client access inside target LAN?

Re: Interfacing an AM2302 DHT sensor with RPi?