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  • The Universal MQTT Remote

    Thank you for showing this. I am at the moment controlling an RC car using MQTT with the Raspberry Pi on the car and the controller being MQTT-Dash on my Android tablet. My writeup is here but as it was just intended for me it probably won't make much sense. Basically I was converting the software from another application that you would find written up in previous blogs. https://madsmaddad.blogspot.com/2020/09/rc-car-4-1...I was contemplating using a WEMOS D-1 as a wireless device on an Arduino Uno to do what you have done, but I see that I can just do it with the Wemos, the Arduino is not needed. If I have a question it is whether I need pull-up resistors. The buttons that I have connect to ground. Well done and well explained.

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  • PeterM506 commented on GranPI2's instructable Raspberry Pi RC Control
    Raspberry Pi RC Control

    Thanks for an interesting way of doing it. I have done it using my tablet as a controller and a R-Pi on the remote veheicle as a receiver/controller. I was considering how to get better range out of it and am looking at MQTT to try for faster response times. Here is one of my blogs about how it was done: https://www.blogger.com/blog/post/edit/54155600369...Interesting to hear your thoughts on it.

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  • From the Arch Linux wiki for a wireless Access Point, to determine if a dongle is capable of being a software Access Point, run 'iw list'. Mine isn't.

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  • Further information. I have just discovered that not all Wifi dongles work as an AP. My Aqprox one won't. Maybe more later if I discover why and how to fix it. That's a ralink chipset. The ZD1211 dongle is quite happy.

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  • I have been doing this for a couple of years in my spare time. I have tried a number of solutions such as WebIOPi and Wyliodrin, WebIOpi only worked with earlier releases of Raspbian. I wanted a solution that was free standing and didn't need Internet access. I The solution that I have working for me is based on an article in Linux Format Magazine LXF229 Oct 2017 about using Flask for a web server. As my use of HTML is ancient I found w3schools https://www.w3schools.com/ very useful When I had it working I made the Raspberry Pi into an Access Point using: https://www.raspberrypi.org/documentation/configuration/wireless/access-point.mdAnd now my RC-Car is untethered from any network. Other comments. 1] The Raspberry Pi must be seperately supplied from the power to the motors or it hung t…

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    I have been doing this for a couple of years in my spare time. I have tried a number of solutions such as WebIOPi and Wyliodrin, WebIOpi only worked with earlier releases of Raspbian. I wanted a solution that was free standing and didn't need Internet access. I The solution that I have working for me is based on an article in Linux Format Magazine LXF229 Oct 2017 about using Flask for a web server. As my use of HTML is ancient I found w3schools https://www.w3schools.com/ very useful When I had it working I made the Raspberry Pi into an Access Point using: https://www.raspberrypi.org/documentation/configuration/wireless/access-point.mdAnd now my RC-Car is untethered from any network. Other comments. 1] The Raspberry Pi must be seperately supplied from the power to the motors or it hung the moment the motor wanted current. I used a small backup battery pack for this. https://www.ebay.co.uk/i/263708411847?chn=ps2] I have three cars that I have picked up along the way. All have a 16 pin DIL IC as the radio receiver/controller. All three cars have IC's from different manufacturers, but all three use the same pins for Left/Right and Forward/Backwards, so if I was clever I would solder in an IC header and use a second header to plug into it so that I could move my R-Pis around. 3] I orignally put the AP softweare on my new raspberry Pi zero W (inbuilt Wireless) abut this didn't work when I put the program SD card in an older Pi with an external WiFi dongle. I realised also that in doing it this way I had no fallback communications as this Pi does not have an Ethernet interface. My first ever attempt at videoing something for YouTube is here showing the WebIOPi version:A second recording Different car, I am not sure if it is the same software, is here:Yours is obviously far more complex than mine with the PWM control of the motors. Well Done.

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    • Fixing Garage Door Vertical Spring Mount
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      3 comments
  • Thanks MikB, I did find the missing pieces. That is them in the first photo taped to the inside of the door. I initially for a few days had the spring pulled down with multiple turns of rope, but I noticed that every time I opened the door the rope had stretched, and eventually it got caught in behind the bottom bracket. The bike lock chain was Ok, even if I couldn't get it too tight. Another mistake that i made was ordering an M8 bolt. It should have been M10.

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  • True. I only use one Pi at a time. A few of my devices (like the printer) have fixed IP addresses and others like my mobile and tablet use DHCP. I like fing a lot for finding things on any network that I am connected to. Take care. The instructions in this are only for using the one hardware pwm pin, not software pwm as supported by WiringPi as far as I can see.Cheers,

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  • IoT - Controlling a Raspberry Pi Robot Over Internet With HTML and Shell Scripts Only

    Great, It is working using your program and taking out the <xml> tags, Just need to tidy it up a bit. Couldn't find my previous comment to add this to it. Can't add images, but here is the YouTube video: I have uploaded a picture of the board in the RC car that I chopped up to get the connections for the R-Pi.

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  • I always use a static IP on my Raspberry Pi's. they all have the same interfaces file with the same setup as follows: ....auto wlan0allow-hotplug wlan0iface wlan0 inet staticaddress 192.168.1.8netmask 255.255.255.224 *** subnet mask - Yours will probably be differentgateway 192.168.1.1 *** this is my router.wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf

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