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by mattmiller
Thu Jan 17, 2019 9:54 pm
Forum: Python
Topic: MQTT and Python in 2019
Replies: 8
Views: 737

Re: MQTT and Python in 2019

Good luck with Brexit.
Same to you with Trump :)
by mattmiller
Wed Jan 16, 2019 9:37 pm
Forum: Python
Topic: MQTT and Python in 2019
Replies: 8
Views: 737

Re: MQTT and Python in 2019

The "trick" with installing mosquitto on a Pi is to ignore everything on T'internet and start with fresh Raspbian install and simply type in sudo apt-get install mosquitto mosquitto-clients which will install and run a mosquitto broker service on your Pi listening out on port 1883 If you want to wri...
by mattmiller
Tue Jan 15, 2019 11:07 am
Forum: Troubleshooting
Topic: RPi as an AP keeps on disconnecting
Replies: 7
Views: 841

Re: RPi as an AP keeps on disconnecting

AFAIAN you can't bridge between two WiFi interfaces on a Pi (but maybe something changed recently???)

So the question is how does it work for 20 minutes rather than why it fails
by mattmiller
Sun Jan 13, 2019 9:57 am
Forum: Advanced users
Topic: Having Raspbian run startup scripts from the /boot partition
Replies: 10
Views: 2798

Re: Having Raspbian run startup scripts from the /boot partition

Check out PiBakery - its the tool for this sort of job

https://www.pibakery.org/
by mattmiller
Sun Jan 13, 2019 9:55 am
Forum: Automation, sensing and robotics
Topic: Running 28BYJ-48 stepper motor in full step mode
Replies: 6
Views: 975

Re: Running 28BYJ-48 stepper motor in full step mode

JFI this article seems a good source of info on pros/cons on the stepping modes http://www.jangeox.be/2013/10/stepper-motor-28byj-48_25.html The value for money of these steppers means you can make very cheap robots that can move much more accurately, albeit slower, than PWM motor ones. I've used th...
by mattmiller
Sat Jan 12, 2019 10:02 pm
Forum: Automation, sensing and robotics
Topic: Running 28BYJ-48 stepper motor in full step mode
Replies: 6
Views: 975

Re: Running 28BYJ-48 stepper motor in full step mode

In half-step mode with long delays between phases its quite a while since I played with these steppers but IIRC, there are sweet spots in terrms of the delay between the steps - longer delays does not necessarily lead to happiness I might be completely wrong but 1-2.5ms comes to mind between steps ...
by mattmiller
Sat Jan 12, 2019 9:21 am
Forum: Troubleshooting
Topic: Raspian 9 - question with lirc
Replies: 5
Views: 426

Re: Raspian 9 - question with lirc

JFI
I have copied the file into ~/lircd.conf
All my files are in /etc/lirc

Probably makes no difference - like I say - I set mine up a few years ago and things may have changed since then
by mattmiller
Sat Jan 12, 2019 9:15 am
Forum: Troubleshooting
Topic: Raspian 9 - question with lirc
Replies: 5
Views: 426

Re: Raspian 9 - question with lirc

:(

May be worth trying to use pigpio intead of Lirc?

https://raspberrypi.stackexchange.com/q ... g-ir-codes
by mattmiller
Fri Jan 11, 2019 11:28 am
Forum: Troubleshooting
Topic: Raspian 9 - question with lirc
Replies: 5
Views: 426

Re: Raspian 9 - question with lirc

I am using NP2222 Something in the back of my mind says that if using a driver transistor - you need to invert the signal using some parameter somewhere. But googling isn't getting me anywhere and I may have dreamt it (I just have my IR diode directly connected to my PiZero - very naughty I know bu...
by mattmiller
Mon Jan 07, 2019 3:56 pm
Forum: Automation, sensing and robotics
Topic: MQTT send alert
Replies: 11
Views: 988

Re: MQTT send alert

May i have some help please? From what you previosuly posted, your broker is working fine on your Pi so lets try it out step by step and be explicit e.g use the example launcher.conf first and see if you get any errors with that So copy mqtt-launcher.py to /home/pi/mqtt-launcher.py copy launcher.co...
by mattmiller
Mon Jan 07, 2019 7:26 am
Forum: Troubleshooting
Topic: VNC viewing or RPi prompt from Windows
Replies: 7
Views: 436

Re: VNC viewing or RPi prompt from Windows

Is VNC only for desktop sessions?
Yes
by mattmiller
Tue Jan 01, 2019 5:47 pm
Forum: Troubleshooting
Topic: RPI WiFi / Mqtt communication with Arduino ESP32 unreliable
Replies: 13
Views: 1106

Re: RPI WiFi / Mqtt communication with Arduino ESP32 unreliable

Does anyone else have any idea as to what might be going on here ??
Might be time to try and find an ESP32 forum now that its probably not Pi related?

You might find others with the same/similar issue?
by mattmiller
Tue Jan 01, 2019 12:51 pm
Forum: Troubleshooting
Topic: RPI WiFi / Mqtt communication with Arduino ESP32 unreliable
Replies: 13
Views: 1106

Re: RPI WiFi / Mqtt communication with Arduino ESP32 unreliable

Mine just says LOLIN32 V1.0.0 and has ESP-WROOM-32 written on the actual ESP32 sub-board.

Maybe that ESP32s and your WiFi just don't play nicely with each other?
by mattmiller
Mon Dec 31, 2018 8:03 pm
Forum: Troubleshooting
Topic: RPI WiFi / Mqtt communication with Arduino ESP32 unreliable
Replies: 13
Views: 1106

Re: RPI WiFi / Mqtt communication with Arduino ESP32 unreliable

Mine is a WEMOS LOLIN32

Has worked fine today(publishing to a mosquitto broker on a PiZero) - worst I've seen is occasional 2.5 secs between messages instead of 1 sec

I don't get any wifi dropouts at all and I'm suspecting that the WiFi situation on yours is the culprit
by mattmiller
Sun Dec 30, 2018 11:17 pm
Forum: Troubleshooting
Topic: RPI WiFi / Mqtt communication with Arduino ESP32 unreliable
Replies: 13
Views: 1106

Re: RPI WiFi / Mqtt communication with Arduino ESP32 unreliable

I just ran you code on an WEMOS D1 mini (ESP8266 based) and changing #include <WiFi.h> to #include <ESP8266WiFi.h> and Serial.print((char)payload); to Serial.print((char)payload[i]); It runs OK according to a Node-Red monitor - the count goes up regularly each sec How long do you normally have to wa...
by mattmiller
Sun Dec 30, 2018 8:05 pm
Forum: Troubleshooting
Topic: RPI WiFi / Mqtt communication with Arduino ESP32 unreliable
Replies: 13
Views: 1106

Re: RPI WiFi / Mqtt communication with Arduino ESP32 unreliable

(Shot in the dark) - try changing QOS on your published message from your ESP32 to see if that makes a difference
by mattmiller
Sun Dec 30, 2018 7:59 pm
Forum: Troubleshooting
Topic: RPI WiFi / Mqtt communication with Arduino ESP32 unreliable
Replies: 13
Views: 1106

Re: RPI WiFi / Mqtt communication with Arduino ESP32 unreliable

Just to get more info, can you change to 1 msg/2sec then 1msg/5sec then 1msg/10secs and see if your getting the same sort of 30 sec delay to see if its some sort of buffering issue?

Are you doing anything in your main loop that could be blocking the pubsubclient from running?
by mattmiller
Mon Dec 24, 2018 9:29 am
Forum: Troubleshooting
Topic: Connect to VNC server using hostname?
Replies: 4
Views: 732

Re: Connect to VNC server using hostname?

Yep - it been working consistently on my Win10 machine for the past week.
by mattmiller
Fri Dec 21, 2018 7:35 am
Forum: Beginners
Topic: Pi Zero W ignoring dhcpd.conf
Replies: 1
Views: 204

Re: Pi Zero W ignoring dhcpd.conf

If you take your card from your Pi3B+ and put it into your PiZeroW - does it work?

Also, you need to modify dhcpcd.conf to assign static addresses not dhcpd.conf (notice extra c in the name)

https://www.raspberrypi.org/learning/ne ... p-address/ is the official guide
by mattmiller
Sun Dec 16, 2018 4:54 pm
Forum: Gaming
Topic: 1st generation iPad as Raspberry monitor
Replies: 3
Views: 1013

Re: 1st generation iPad as Raspberry monitor

As with all things its probably possible but I think if someone had done this, it would be widely known about in the Pi community - and I've not heard of it or seen anything posted about it

You can use an IPad as a remote VNC display over WiFi
by mattmiller
Sun Dec 16, 2018 2:32 pm
Forum: Troubleshooting
Topic: CAn no longer ping by hostname
Replies: 19
Views: 1419

Re: CAn no longer ping by hostname

JFI
My Win10 machine updated itself overnight and since then I've been able to use hostnames to VNC and file transfer using SMB again

But I've had false dawns several times since April/May so lets see how long it lasts this time :)
by mattmiller
Sat Dec 15, 2018 12:51 pm
Forum: Troubleshooting
Topic: error when using Node-Red
Replies: 8
Views: 1079

Re: error when using Node-Red

looking at properties of /usr/share/applications/Node-RED.desktop, it simply runs node-red -start. [Desktop Entry] Name=Node-RED Comment=Flow based application composer for the Internet of Things Icon=/usr/share/icons/hicolor/scalable/apps/node-red-icon.svg Exec=node-red-start Type=Application Encod...
by mattmiller
Fri Dec 14, 2018 7:23 pm
Forum: Python
Topic: MQTT and Python
Replies: 4
Views: 306

Re: MQTT and Python

Does that mean that B also have to need to run a client? Yes Both machines act as clients - one sends message to the broker, the other one receives them You can run the broker on either machine or a completely different machine To start with, its much easier to use a public cloud broker such as iot...
by mattmiller
Fri Dec 14, 2018 6:41 pm
Forum: Troubleshooting
Topic: error when using Node-Red
Replies: 8
Views: 1079

Re: error when using Node-Red

Best way to install and get running is to use the official install script

https://nodered.org/docs/hardware/raspberrypi
by mattmiller
Fri Dec 14, 2018 4:03 pm
Forum: Python
Topic: MQTT and Python
Replies: 4
Views: 306

Re: MQTT and Python

It can be confusing :) You need at least one server program (commonly called a broker) that both machines can connect to Then Raspberry A can send the ON/OFF to the broker and the broker will forward those messages to Raspberry B. So both machines are clients The broker can run on any of the Pi or o...

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