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💬 MySensors Easy Pro Mini

openhardware.io last edited by openhardware.io

https://www.openhardware.io/view/410/MySensors-Easy-Pro-Mini
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scalz Hardware Contributor last edited by

@Koresh nice design as usual
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NeverDie Hero Member last edited by

Since it's not wireless, how do you envision this being used?
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sundberg84 Hardware Contributor last edited by sundberg84 @NeverDie

@NeverDie - You could att it to a https://www.openhardware.io/view/4/EasyNewbie-PCB-for-MySensors and get all the benefits from both. I like that it includes ATSHA204A.
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Koresh Contest Winner last edited by

First version of this board does not contain mistakes and works properly. I will remove "work in progress" mark after some tests soon.
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mfalkvidd Mod last edited by @Koresh

@Koresh very nice. Do you plan to sell these assembled? If so, is there an estimated price point?
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terxw last edited by

Hello, can you post BOM please,
according to schematics tantalum schould be 100uF bat tantalum cap in picture is 4.7uF
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ESP8266 as (MQTT) Gateway with I2C Sensors
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@Sunseeker According to the Connecting the Radio page, D2 is the default pin for the CE signal for the NRF24. If you'd like to use this pin for I2C, you can free it up by assigning a different pin for the CE signal by adding this line to your sketch: #define MY_RF24_CE_PIN pin IIRC, all available pins should work for this purpose (D0, D3, D4). Just pick one and if it doesn't work, use one of the other pins. Please make sure to add that line before #include <MySensors.h>.
Rasbberry pi domoticz + arduino nano connection problem
Domoticz • mysensors • • WiktorDIY

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@WiktorDIY The ch340 are notorious for being broken. The best I ever achieved was 19200 and flakey.. I purchased a real Nano not a ch knock off eg uses a different uart no problems
💬 MDMSNode "Lighting X3" (based on ESP8266)
OpenHardware.io • relay temperature esp8266 ota wifi acdc tasmota • • openhardware.io

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First batch of devices arrived. Looks fine. I hope I will manage to install it in garden to the end of the week.
Car battery health monitoring and alerts system with IoT integration
My Project • mysensors temperature led ota iot wifi battery powered bluetooth ble low power rgb motion sensor hardware 3d print battery sensor fota mcu enclosure battery monitor pcb layout battery voltage bluetooth low energy measurement alarm system software antenna 32bit pcb manufacturi pcba dc-to-dc • • William Meli

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@NeverDie Thx for appreciating the work done. There will also be an open source part in the future. When and how extensive the open source part will be, remains to be seen. The release of certain information (block diagram, ..., in this post) is related to those open source parts. There are some OBD solutions, however most of them (in my experience) give back low frequency data put by the car manufacturer on the OBD-bus (CAN, ...). Therefore transients evolving directly from the battery could only be recorded if the manufacturer sends those data accordingly on the bus. Due to the small bandwidth(also because of other car data that have to be sent, ...), such battery data are sent more often once per second or less. Fast battery events (i.e. cranking events, ...) are therefore imperceptible. Unless the manufacturer processes the fast events and then sends them (once per second or less), which is very unlikely if the manufacturer does not market this feature itself. Third parties devices for high frequency sensing costs several hundreds dollars. In my experience, important battery states (especially the fast ones) are recorded by measuring and processing corresponding data directly on the battery. I agree with you about the limits related to the communication over Bluetooth. But i think Bluetooth 5.0 will improve a lot. However, WiFi will always remain an important option due to the high data throughput. The combination of both (BLE & WiFi), especially with regard to energy consumption, will gain in importance.
💬 RFM69 Livolo 2 channels 1 way EU switch(VL-C700X-1_Ver_C2)
OpenHardware.io • mysensors livolo • • openhardware.io

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Hello all, I studied a little bit more this part of the circuit and it's a standard self oscillating flyback converter or a ringing choke converter as others call it. Indeed it provides the most compact solution for space constrained designs. But all of this comes at a cost: it's difficult to obtain a stable circuit and it has to be tuned by trial and error - at least this is what the literature says. I'm not a switching power supplies expert here(even though I want to learn more about SMPS's in general but my time is limited for now) but I've come to a conclusion: it's difficult to tune this or to change the existing circuit to accommodate the mysensors circuits power requirements. I tried various combinations using sleep schemes and to change the flyback converter components as other mentioned in the mysensors forum and indeed I can power up my custom design that is presented in this thread BUT it's NOT STABLE. From time to time the switching transistor(mje13003) burns out and this is because I removed the resistor placed at the input of this power supply - near the bridge rectifier and replaced it with a wire(this is not the same resistor as @Lukaspp replaced from the base of the transistor which is the startup resistor for the flyback converter). Now the only purpose that I imagine for this resistor is to suppress the transients - but it has a big value(100Kohm) which limits the current to a non-usable value for our purpose. I know that there are other solutions to overcome the transients but they are either bulky or too slow for this(correct me if I'm wrong here). More than that let's not forget that we have 2 power supplies here and when the lights go on the first supply(flyback) input gets shorted by the relays contact(I have the relays variant btw not the one with triac) so I'm thinking that other transients appear here as the primary inductor doesn't like that as far as I know - so I assume the above mentioned resistor of 100Kohm comes into play here too. Another role for it would be to limit the inrush currents. I played with that value too but it needs to be very low to have something stable and I got a value around 200ohms but that doesn't help as it's too low and after some time the resistor burned up and saved my transistor :simple_smile: . Now with all the tricks in the world and tuning the flyback converter to give more current this won't help as again let's not forget we have a SERIES circuit here so without external intervention we can't achieve that(only if we break somehow the laws of physics or maybe my thinking is limited :simple_smile: ). In this case the external capacitor placed across the light bulb comes into play to supply enough current to the standby circuit which is our flyback converter over here. I played with that one too and from 0,47uF I got to 4.7uF to have a decent result - but this one gets bulky and more expensive from obvious reasons. And let's not forget that the light bulb itself has some impact overall because this is the actual LOAD that we want to control and there are various light bulbs over there with various requirements. More than that they have their power supply embedded which in most of the cases is a(you guessed maybe): a self oscillating FLYBACK CONVERTER or similar. So this one too has inrush currents, transients which are sensed down the line to our dear Livolo switch and affects my custom board stability again :simple_smile: - isn't life beautiful? :simple_smile: So far these are the results of my trials and none of them proved to be stable so I kinda gave up on this and will try to use a normal powering scheme somehow(as Sonoff switches with a battery powered touch switch on the wall). Not the best solution of all but this is what you get when the infrastructure wasn't thought for this scenarios from the beginning. The Livolo guys thought of all of this I assume so that's why they stayed only with a simple circuit - a PIC mcu which maybe sleeps most of the time and a simple radio receiver which draws around 5mA or even less - so yeah that's why this works and it's stable in its original form.
💬 MySensors ESP8266 MQTT gateway
OpenHardware.io • mysensors gateway esp8266 contest2017 • • openhardware.io

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@Roland-Wijnen Hi! Were you able to compile the available files? I tried, but there has been a lot of error!
Washer Monitor
OpenHardware.io • mysensors contest2016 arduino nano photo-resistor washing machine washer • • openhardware.io

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💬 Safe relay node
OpenHardware.io • mysensors nrf24l01 relay atmega328 acs712 safe ssd ds18s20 moc3063-m bta206 smart nrp05-a-05d ap9930gm1 • • openhardware.io

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Hello Berk, Is it possible for you to share your schematic for this project please? especially the power part?

💬 MySensors Easy Pro Mini

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OpenHardware.io • mysensors gateway esp8266 contest2017 • • openhardware.io

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💬 MySensors Easy Pro Mini

Suggested Topics

ESP8266 as (MQTT) Gateway with I2C Sensors Hardware • mysensors • • Sunseeker

Rasbberry pi domoticz + arduino nano connection problem Domoticz • mysensors • • WiktorDIY

💬 MDMSNode "Lighting X3" (based on ESP8266) OpenHardware.io • relay temperature esp8266 ota wifi acdc tasmota • • openhardware.io

💬 RFM69 Livolo 2 channels 1 way EU switch(VL-C700X-1_Ver_C2) OpenHardware.io • mysensors livolo • • openhardware.io

💬 MySensors ESP8266 MQTT gateway OpenHardware.io • mysensors gateway esp8266 contest2017 • • openhardware.io

Washer Monitor OpenHardware.io • mysensors contest2016 arduino nano photo-resistor washing machine washer • • openhardware.io

💬 Safe relay node OpenHardware.io • mysensors nrf24l01 relay atmega328 acs712 safe ssd ds18s20 moc3063-m bta206 smart nrp05-a-05d ap9930gm1 • • openhardware.io

24Online

11.6kUsers

11.2kTopics

113.0kPosts

ESP8266 as (MQTT) Gateway with I2C Sensors
Hardware • mysensors • • Sunseeker

Rasbberry pi domoticz + arduino nano connection problem
Domoticz • mysensors • • WiktorDIY

💬 MDMSNode "Lighting X3" (based on ESP8266)
OpenHardware.io • relay temperature esp8266 ota wifi acdc tasmota • • openhardware.io

💬 RFM69 Livolo 2 channels 1 way EU switch(VL-C700X-1_Ver_C2)
OpenHardware.io • mysensors livolo • • openhardware.io

💬 MySensors ESP8266 MQTT gateway
OpenHardware.io • mysensors gateway esp8266 contest2017 • • openhardware.io

Washer Monitor
OpenHardware.io • mysensors contest2016 arduino nano photo-resistor washing machine washer • • openhardware.io

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OpenHardware.io • mysensors nrf24l01 relay atmega328 acs712 safe ssd ds18s20 moc3063-m bta206 smart nrp05-a-05d ap9930gm1 • • openhardware.io

24
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