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  • gopinath.marappan commented on gopinath.marappan's instructable IoT Power Strip7 months ago
    IoT Power Strip

    I bought the app (the Android version) nearly two years back for Rs. 323 (around $5). Not sure about the current price though. You can check it out on the Android or IOS app store.There are various apps now available that are free, but two years back, the free apps were not suitable for my needs, hence bought NetIO. Now I am not sure if the free apps are better than NetIO, but i am sticking to NetIO since it works perfectly for me. Of course, there are a few more features that I would like in NetIO and that may be available in the free apps, but I haven't got the time or the patience to test them out :)

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  • gopinath.marappan's instructable IoT Power Strip's weekly stats: 7 months ago
    • IoT Power Strip
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  • Capacitive soil moisture measuring (with I2C)

    Thanks for your message sir. In my probe, the distance between the probe and the Arduino is just a couple of centimetres. The Arduino is at the top of the probe itself. Hence, I dont think the length of the wire could be playing a part here. I have checked and rechecked everything, but in the soil it always give very erratic readings. I have the pcb mask itself, then i have a layer of plasti dip spray. I checked all the points that could be exposed and covered them with kapton tape. But still no luck.If i take the probe out and cover it with my hand, then it gives very stable readings - relative to the moisture content in my hand.I am using 30 as the number of samples to the capacitiveSensor() function. I think i have tried using 100 or 200 samples before. I will try it again...

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    Thanks for your message sir. In my probe, the distance between the probe and the Arduino is just a couple of centimetres. The Arduino is at the top of the probe itself. Hence, I dont think the length of the wire could be playing a part here. I have checked and rechecked everything, but in the soil it always give very erratic readings. I have the pcb mask itself, then i have a layer of plasti dip spray. I checked all the points that could be exposed and covered them with kapton tape. But still no luck.If i take the probe out and cover it with my hand, then it gives very stable readings - relative to the moisture content in my hand.I am using 30 as the number of samples to the capacitiveSensor() function. I think i have tried using 100 or 200 samples before. I will try it again just to be sure.I do see the readings change when i add water to the pot, but its still erratic. If its within an acceptable range, i could try averaging them out. But I get many 0 readings which will mess up the averages.I will keep trying and will update if I get lucky :)Cheers.

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  • Automatic watering system with capacitive probe and Arduino on the cheap (and I mean it)

    Thanks for the pointers! I will take a relook at everything and hopefully i can find the cause. Will update this thread again if I am able to fix the issues. Thanks again.

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  • Capacitive soil moisture measuring (with I2C)

    Hey,I have made these probes based on the design in http://pcb.daince.net/doku.php?id=sensor_soil_2. Initially my plan was to read the sensors using a ATTINY84 and then use a ESP8266 module conneted to it through the serial port to trasnmit the data. Later i changed the design to use a Arduino Pro Mini and a nrf24 module. I use the Arduino capsense module to read the capacitance values of the sensors directly from the microcontroller.Note that for extra protection I have coated the sensors with Plasti dip spray.If I hold the sensor in my hand with my fingers tightly wrapped around, i get pretty consistent values with a variation of just 1 to 3%. But when i insert the sensor into the soil of a vegetable pot, then the readings that i get become very, very erratic - more than 20 to 30%. I ...

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    Hey,I have made these probes based on the design in http://pcb.daince.net/doku.php?id=sensor_soil_2. Initially my plan was to read the sensors using a ATTINY84 and then use a ESP8266 module conneted to it through the serial port to trasnmit the data. Later i changed the design to use a Arduino Pro Mini and a nrf24 module. I use the Arduino capsense module to read the capacitance values of the sensors directly from the microcontroller.Note that for extra protection I have coated the sensors with Plasti dip spray.If I hold the sensor in my hand with my fingers tightly wrapped around, i get pretty consistent values with a variation of just 1 to 3%. But when i insert the sensor into the soil of a vegetable pot, then the readings that i get become very, very erratic - more than 20 to 30%. I even get a value of zero often.I am really puzzled by this behavior. If there is a problem with either the sensor construction or the electronics then I should be getting erratic readings all the time. But thats not the case. If I hold the sensor with my fingers wrapped around, then I am getting consistent values.Do you have any suggestions for me to fix this issue (where the sensors are giving very erratic values when inserted in soil)? Thank you, Gopi.

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  • Automatic watering system with capacitive probe and Arduino on the cheap (and I mean it)

    Hey,I have made these probes based on the design in http://pcb.daince.net/doku.php?id=sensor_soil_2. Initially my plan was to read the sensors using a ATTINY84 and then use a ESP8266 module conneted to it through the serial port to trasnmit the data. Later i changed the design to use a Arduino Pro Mini and a nrf24 module. I use the Arduino capsense module to read the capacitance values of the sensors directly from the microcontroller.Note that for extra protection I have coated the sensors with Plasti dip spray.If I hold the sensor in my hand with my fingers tightly wrapped around, i get pretty consistent values with a variation of just 1 to 3%. But when i insert the sensor into the soil of a vegetable pot, then the readings that i get become very, very erratic - more than 20 to 30...

    see more »

    Hey,I have made these probes based on the design in http://pcb.daince.net/doku.php?id=sensor_soil_2. Initially my plan was to read the sensors using a ATTINY84 and then use a ESP8266 module conneted to it through the serial port to trasnmit the data. Later i changed the design to use a Arduino Pro Mini and a nrf24 module. I use the Arduino capsense module to read the capacitance values of the sensors directly from the microcontroller.Note that for extra protection I have coated the sensors with Plasti dip spray.If I hold the sensor in my hand with my fingers tightly wrapped around, i get pretty consistent values with a variation of just 1 to 3%. But when i insert the sensor into the soil of a vegetable pot, then the readings that i get become very, very erratic - more than 20 to 30%. I even get a value of zero often.I am really puzzled by this behavior. If there is a problem with either the sensor construction or the electronics then I should be getting erratic readings all the time. But thats not the case. If I hold the sensor with my fingers wrapped around, then I am getting consistent values.Do you have any suggestions for me to fix this issue (where the sensors are giving very erratic values when inserted in soil)? Thank you, Gopi.

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  • An inexpensive IoT enabler using ESP8266

    I am not really sure what the error is.Btw, I have stopped writing firmware code by using the SDK directly. . Instead i use Arduino IDE with ESP8266 support to code for ESP8266 now. Have you tried that approach? Its a lot simpler than using the SDK directly.

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  • IoT Wall Outlet with Arduino and ESP8266

    I am not an expert with electrical installations. But from what I understand, at a basic level, a circuit breaker works like a switch. That is if there is a short in the circuit, the circuit breaker will "break" the circuit just like an ordinary fuse does.If thats the case, the circuit breaker should be installed on the "lines" wire before your 'project'. Hence if something goes wrong, then the circuit breaker can handle it.But I would recommend you to talk to an expert in this field and review other online materials before you install a circuit breaker. Working with mains AC could be quite dangerous and unforgiving. And hence all precautions should be taken before you attempt to do it. If you are unsure about anything, I would strongly suggest you not to do it.

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  • An inexpensive IoT enabler using ESP8266

    Are you using different client IDs from the two modules or the same ID? Using the same IDs may cause such an issue, i think. If thats the case, try using different client IDs for the two modules.

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  • gopinath.marappan followed diy_bloke1 year ago
  • An inexpensive IoT enabler using ESP8266

    I would disagree. My intention with this instructable was not to teach all the basics. Rather i wanted to show how to construct an inexpensive to board to control a light and to post temperature data to the web. I really don't see a point to replicate information that is already widely available. Also, those steps could change and it would be tedious to keep my instructable up to date with those changes.I agree the steps may not be easy, especially if you want do how to through the SDK method. I suggest you look at nodeMCU firmware and LUA scripts if you want to try this. Again the steps are easily available if you google for it.

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