Let's Control It

dynamicdave

I'm trying to use MQTT (from Node-RED) to control a servo - not working. The topic in the MQTT-Out node in NR is.... node68/servo/1/14 with a msg.payload of 120 The on-board blue LEDon the Wemos flashes to indicate a transfer has taken place, just seems the command is not understood. However, if I u...

dynamicdave

I use the formula (1024-%value%)/100 in my soil monitor.
Here's a link to the tutorial guide.

http://resources-area.co.uk/node-red-fl ... sensor.pdf

On my set-up I'm using a small-signal transistor to switch the +3V3 rail on/off to the soil sensor (to reduce the effects of corrosion).

dynamicdave

Thanks for pointing out that I should have surrounded the json string (in the Publish command) with single quote marks.

I can confirm that the json string publishes correctly in this release ( ESP_Easy_mega-20191028-21-PR_2698_normal_ESP8266_4M1M.bin ).

dynamicdave

Thanks for pointing out that I should have surrounded the json string (in the Publish command) with single quote marks.

I can confirm that the json string publishes correctly in this release ( ESP_Easy_mega-20191028-21-PR_2698_normal_ESP8266_4M1M.bin ).

dynamicdave

I've just tried again with release... ESP_Easy_mega-20191028-21-PR_2698_normal_ESP8266_4M1M.bin I have a publish command in a rule-set to publish a 'json' string. It would seem if the payload is just a single item, then it works. Publish,node24/ir_detector,{"ssid":"%ssid%"} If it...

dynamicdave

I've just tried again with release... ESP_Easy_mega-20191028-21-PR_2698_normal_ESP8266_4M1M.bin I have a publish command in a rule-set to publish a 'json' string. It would seem if the payload is just a single item, then it works. Publish,node24/ir_detector,{"ssid":"%ssid%"} If it...

dynamicdave

I tried the version you mentioned and it does NOT work for me when I try to publish via a rule.

Note:
This is using a rule-set that works fine in a previous release (mega-20191003)

dynamicdave

Hi,
Just checking if you have any plans to support the TEA5767 FM receiver that has an I2C interface ??

Kind regards, David

dynamicdave

Hi Sasch,
Could I take you up on your offer to send/publish your config settings as I'd like to setup one of my spare Wemos D1 Mini as a test vehicle.

Regards, David.

PS:
Oops - should have opened my eyes and look in the thread above.

dynamicdave

All my nodes (Wemos D1 Minis) have fixed IPs.

They all run Home Assistant (OpenHAB) MQTT.

I'll have to check and try fixing the WiFi channel and see if I can get a length of time that matches @Sasch600xt

dynamicdave

Just a quick update...

Just checked one of my Wemos nodes and was surprised that it had gone for 29-days without a reboot !!!

dynamicdave

Where did the schematic diagram, shown above, come from???

It looks to me (the way it is wired) as if the relay contact will short-out the relay coil and destroy the transistor/FET !!!!

dynamicdave

Just checked one of my Wemos D1 Minis and found it had been running for over 18-days without a reboot.
This one has capacitors (large and small) fitted to the +5V and +3.3V power rails.

: ScreenShot095.png (20.02 KiB) Viewed 14594 times

dynamicdave

The only comment I would make (from my experience of using 'rules') would be to place the timerSet,5,1 as the last statement. i.e. interchange the position of timerSet,5,1 and gpio,15,1 On Clock#Time=All,22:00 do let,1,1 // compteur de boucles (de 3 zones) de 1 à %v2% let,2,5 // nombre de boucles (d...

dynamicdave

I'd give a thumbs-up for @iron suggestion (as I don't think it will be possible to make a set of lists to keep everyone happy).

dynamicdave

Has something changed recently with the Switch plugin ??? I used to be able to send an event (from Node-RED vai MQTT) to trigger a rule that would toggle a GPIO pin. So I could (remotely) check if the input was working. I also used a Switch plugin to check the state of an input (on the same pin) (th...

dynamicdave

I bought these solar panels from Banggood for one of my students who built a solar-powered weather station earlier this year. https://www.banggood.com/5_5V-1W-180mA-9595mm-Polycrystalline-Mini-Solar-Panel-Photovoltaic-Panel-p-999056.html?rmmds=myorder&cur_warehouse=CN He used pretty well the sam...

dynamicdave

Here's the link to the project on Discourse Node-RED.

https://discourse.nodered.org/t/solar-p ... n/12499/73

The project was split into six managable stages.

I hope you find this useful.

dynamicdave

What's an Akku ???? Is it possible to put the ESP board in the shade and power it from a solar panel ??? One of my students has made a solar-powered weather station using a Wemos D1 Mini (ESP8266 running ESP-Easy). He puts the board to sleep for 15-minutes (to save energy), then when it wakes up it ...

dynamicdave

Wooooo - that's impressive.
Looks like you are collecting a lot of data.
Thanks for sharing your work.

dynamicdave

Really pleased to hear you got it working. The format you ended up with is very similar to what I would send from Node-RED via MQTT to a Wemos D1 Mini. Have a great weekend. Cheers from David. PS: What you could try next is... sending a message to your mobile phone using 'Telegram' telling you someo...

dynamicdave

Hi to @Quart
Just checking... Did you manage to get MQTT working to operate your LEDs ??

dynamicdave

Just guessing... but I would try a topic of.... YOUR_UNITS_NAME/gpio/15

and a Message of.... 0 or 1 or maybe "0" or "1"

Have you tried looking to see if there are any tutorials on the 'Homey' website ??

Best of luck.

dynamicdave

Sorry I have no idea as I've NOT heard of Homey until you mentioned it.

You might find someone on this forum that has experience of how to use it.

Good luck from David.

dynamicdave

Hi,
I've been running a Wemos D1 Mini for just over 5-days with the latest firmware and have not had any re-boots (yippee).

: ScreenShot073.png (20.37 KiB) Viewed 12729 times

dynamicdave

In my first screen-shot I'm using two 'inject' nodes that inject a number... 0 and 1 into the MQTT-Out node. Your mqtt config is fine PROVIDED the format of the topic matches the MQTT nodes in Node-RED. I've given up using the forward slash at the start of the topic as it's not recommended in the MQ...

dynamicdave

Here are some screen-shots that might help. It's a very simple test flow to turn on/off an LED connected to pin 15 (D8) on the Wemos. You can obviously change this to use other pins. D6 (pin 12) is one of my favourite pins I use. In my set-up the MQTT broker is running on a Raspberry Pi on 192.168.1...

dynamicdave

I don't use Arduino, so I'd have to look it up the same as you. I use Node-RED and MQTT (Mosquitto). All my ESP8266s (well they are Wemos D1 Mini devices really) talk to Node-RED running on a Raspberry Pi (which is the sort of server on the system) via MQTT, and Node-RED sends commands to the Wemos ...

dynamicdave

Here's a link to a project I gave to my IoT students about using NeoPixels.

https://discourse.nodered.org/t/control ... ixels/4560

http://resources-area.co.uk/node-red-fl ... pixels.pdf

dynamicdave

First of all - you can't use two normal 5mm LEDs in series (driven from the Wemos +3.3V line) as the forward voltage drop across each LED is approx 1.8V. So two in series is 3.6V which means they won't turn on. Here are a couple of very quick and VERY rough sketches for you. One shows two LEDs in se...

dynamicdave

I bought three of these RGB strips for GBP 4.00 from Banggood in China. https://www.banggood.com/3Pcs-CJMCU-8-Bit-WS2812-5050-RGB-LED-Driver-Development-Board-p-983036.html?rmmds=myorder&cur_warehouse=CN One of the great things about NeoPixels is you can control the amount of RGB colour in the e...

dynamicdave

The ESP8266 and Wemos D1 Mini are +3V3 devices - so please don't connect +5V to them. You can use a transistor to buffer the ESP8266 to the 5V LEDs or even a relay or a level shifter. Small single LEDs normally run off of 1.6V, so you could think about having two in series with a suitable current li...

dynamicdave

I'm trying to get a set of touch buttons to work with a Wemos D1 Mini.

I've had them working in the past - just wondered if there was anything in the lastest mega release (2019-08-17) that affected their operation???

Or can someone tell me which release works with Touch Buttons.

Thanks.

dynamicdave

Oops - sorry, didn't spot the 'http post' requirement.
Hope you find a solution that works for you.

dynamicdave

The approach I've taken is NOT to use the Sleep Mode options - just leave them turned off. Then in one of the Rule-Sets use... deepsleep,<some_fixed_sleep_value> e.g. deepsleep,600 << Send Wemos to sleep for 10-mins i.e. 600 seconds One of my IoT students has built a solar-powered weather station th...

dynamicdave

Hi Keith,
Really nice to welcome you aboard.
Hope you find somethings that will help you with your Home Automation.

Quite a few of the guys here use Wemos D1 Mini devices (which are ESP8266-based) and Raspberry Pi(s) running Node-RED and MQTT (Mosquitto).

Regards, David.

dynamicdave

Is this still the case??

I have four PM messages that have been sitting in my OutBox for quite some time.

dynamicdave

Quick update...

+3days uptime with mega-20190805 norrmal 4Mb running on a Wemos D1 Mini.

Fingers crossed this will be huge step forward for mankind.

dynamicdave

Same here... +1day uptime with mega-20190805 norrmal 4Mb running on a Wemos D1 Mini.

dynamicdave

Looking at your photo it would appear you are using the on-board Rainsun antenna.

If you plan to use the external antenna (to get an increased WiFi range) then you will need to move the 0-ohm resistor (not an easy task as I found to my cost!!).

dynamicdave

wemos_sm.jpg In the packet with the Wemos D1 Mini PRO (that I received from China), were three or so different length connectors-with-pins. I used the longest ones and soldered them through the Wemos just like you appear to have done. This means they are long enough to go into the sockets on a brea...

dynamicdave

Yes - I would use a 330uF or 470uF with a 0.1uF (or 100nF) in parallel.

The large capacitor acts as smoothing capacitor whilst the small one should deal with any nasty spikes on the PSU rail.

Hope this helps.

dynamicdave

Here's a link to a solar-powered weather station one of my IoT Club students has been building.

It includes a TP4056 to handle charging a Li-Ion battery from a solar-panel.

The project uses a Wemos D1 Mini and ESP-Easy of course!!!

https://discourse.nodered.org/t/solar-p ... tion/12499

dynamicdave

Something like this should work... On startWatering Do gpio,12,1 //Activate the relay TimerSet,1,900 //Start the timer for 15-mins EndOn On stopWatering Do gpio,12,0 //Deactivate the relay TimerSet,1,0 //Reset the timer EndOn On Rules#Timer=1 Do gpio,12,0 //Deactivate the relay EndOn

dynamicdave

First idea that springs to mind is to send an 'event-commnad' (via MQTT) to the Wemos. Set-up a Rule-Set (in the Wemos) to listen for the event-command, and in the rule-set set the GPIO (gpio 12) and also trigger a timer for 15-minutes. If your main server (or whatever is sending the MQTT commands) ...

dynamicdave

I'd agree with that - I would be interested to try out SmartNodeRules.

dynamicdave

You could try this test routine. It publishes sensor readings every 10-minutes (i.e. 600 seconds) you might want to reduce that during testing. on System#Boot do timerSet,1,600 endon on Rules#timer=1 do publish reading/t41, {"deviceId":"t41", "value":[ds18b20#temperatur...

dynamicdave

Your syntax isn't quite the same as mine (don't know if it will make a difference). Maybe try... on Clock#Time=All, **:** do Publish /DataTopic,{"device":"MAdevice","cmd":"Humidity","method":"get","Humidity":[DHT22#Humidity]} endo...

dynamicdave

Hi, I've been using MQTT to publish messages( i.e. temperature values and supporting text like "Too Hot", "OK", "Too Cold") to a miniature OLED I2C module (connected to an Wemos Mini D1 ESP8266). I know it's not HTTP but MQTT works really well on the ESP8266 with ESP Ea...

dynamicdave

Don't know if this will help. I use the 'publish' command within a Rule-Set to publish a JSON string of values. e.g. publish remoteDevice/dataTransfer/reading,{"local_time":"%lcltime_am%","ssid":"%ssid%","ip":"%ip%","temperature":...

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