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Need help with my IoT Project ESP8266 NodeMcu to ESP12-E

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Òscar Fuentes 3 years ago

Good evening, I am doing a project in which I want to measure air quality. I started the project with the ESP8266 NodeMcu board and three sensors, temperature (DHT22), VOC's (CCS811) and PM (PPD42). I have it all assembled with a breadboard and the NodeMcu and it works fine. The fact is that I want to pass it to PCB and I am a little lost. From what I've been reading, I have to use the same board but without NodeMcu, so I use ESP12-E. I have tried to make a design, (I attach images). I copied the connections that I already have working on the NodeMcu and grouped all the GND connections in a single point. ![Schematic](https://i.postimg.cc/MGfR4rFD/Captura.jpg) The 3V3 pins I still have no idea how to do it, if anyone can give me a hand I would appreciate it. Also I do not know if the connections are good, since the NodeMcu has several components and I do not know if I have to put them here too, I am very new, if someone could confirm that the connection is correct I appreciate it. Am I wrong or am I on the right track? Thanks a lot! (::

Chrome 89.0.4389.90 Windows 10 EasyEDA 6.4.17

Comments

andyfierman 3 years ago

Please help us to help you. If you can show your project publicly then please don't just post images of your project: make your project public and post the url to it here. [https://easyeda.com/forum/topic/How-to-ask-for-help-and-get-an-answer-71b17a40d15442349eaecbfae083e46a](https://easyeda.com/forum/topic/How-to-ask-for-help-and-get-an-answer-71b17a40d15442349eaecbfae083e46a) and: [https://easyeda.com/forum/topic/How-to-make-a-Project-public-and-share-the-links-to-it-9f006513b84b412580910905b0281d20](https://easyeda.com/forum/topic/How-to-make-a-Project-public-and-share-the-links-to-it-9f006513b84b412580910905b0281d20)

Chrome 88.0.4324.152 AndroidOS 10 EasyEDA 6.4.17

Òscar Fuentes 3 years ago

@andyfierman Of course! I have already put it in public and shared in the link that he told me. Thanks a lot!

Chrome 89.0.4389.90 Windows 10 EasyEDA 6.4.17

andyfierman 3 years ago

@oscarfuentes99.of, Sorry but I cannot see any hyperlink to your project in your posts.

Chrome 88.0.4324.152 AndroidOS 10 EasyEDA 6.4.17

Òscar Fuentes 3 years ago

[https://easyeda\.com/editor\#id=\|e2df41ecd9b54cf7977dbb884a1cee1d](https://easyeda.com/editor#id=%7Ce2df41ecd9b54cf7977dbb884a1cee1d)

Chrome 89.0.4389.90 Windows 10 EasyEDA 6.4.17

Òscar Fuentes 3 years ago

@andyfierman [https://easyeda\.com/editor\#id=\|e2df41ecd9b54cf7977dbb884a1cee1d](https://easyeda.com/editor#id=%7Ce2df41ecd9b54cf7977dbb884a1cee1d)

Chrome 89.0.4389.90 Windows 10 EasyEDA 6.4.17

Markus_ee 3 years ago

Hi! The usual setup is that you have USB port where you get 5V and then you use linear voltage regulator to get 3.3V Usually AMS1117-3.3 is a good option for getting that 3.3V And if you want to program your ESP module in-circuit, then you need something like this to convert USB data to UART: [https://lcsc.com/products/USB-ICs_576.html?q=CH340](https://lcsc.com/products/USB-ICs_576.html?q=CH340) I'll be happy to help with schematic and PCB checking once you have those done. Regards, Markus Virtanen HW / Electronics Designer

Chrome 89.0.4389.90 Windows 10 EasyEDA 6.4.17

Òscar Fuentes 3 years ago

@markus_jidoka I found an AMS117 5V - 3.3V schematic, I don't know if it can work with my project, could you please confirm it (I'm not sure if the + 5V I can put from a micro USB or I have to do something different). If it works well, how do I connect it with the board or sensors? [https://easyeda.com/editor#id=69bdc420cc1f484aa39ef9b0124f8d0c](https://easyeda.com/editor#id=69bdc420cc1f484aa39ef9b0124f8d0c)

Chrome 89.0.4389.90 Windows 10 EasyEDA 6.4.17

Òscar Fuentes 3 years ago

@markus_jidoka Sorry, wrong link. New link: [https://easyeda\.com/editor\#id=\|a265fa5622d34ec082f6c604531715ff](https://easyeda.com/editor#id=|a265fa5622d34ec082f6c604531715ff)

Chrome 89.0.4389.90 Windows 10 EasyEDA 6.4.17

Markus_ee 3 years ago

Hi! The regulator part works well on your board. If you don't want to add microusb connector, then you can use just a standard barrel plug connector to supply 5V. Then you just feed the output of the regulator, 3.3V to all Vcc pins of your devices. -Markus

Chrome 89.0.4389.90 Windows 10 EasyEDA 6.4.17

Òscar Fuentes 3 years ago

@markus\_jidoka at the regulator output\, J\-Header\-Male\-2\.54\_1x2 has two numbers \(1 and 2\)\, how do I connect it with the Vcc pins? On the other hand, the VCC pin of the PPD42 sensor is 5V, I suppose I must connect it before the regulator, in some pin of the micro-USB Thank you so much!

Chrome 89.0.4389.90 Windows 10 EasyEDA 6.4.17

Markus_ee 3 years ago

Hi! Where do you use that header (2.54_1x2)? And yes, you need to supply 5V to that sensor, so you need to feed that from straight micro usb -Markus

Chrome 89.0.4389.90 Windows 10 EasyEDA 6.4.17

andyfierman 3 years ago

And don't forget to add power supply decoupling capacitors. [https://easyeda.com/forum/topic/UPDATED-Power-supply-decoupling-and-why-it-matters-30a39d0a77f34d5d8dc77e37c035b3d3](https://easyeda.com/forum/topic/UPDATED-Power-supply-decoupling-and-why-it-matters-30a39d0a77f34d5d8dc77e37c035b3d3) :)

Chrome 88.0.4324.152 AndroidOS 10 EasyEDA 6.4.17

Òscar Fuentes 3 years ago

@markus_jidoka @andyfierman Hello good, First of all, thank you very much for your constant help, I appreciate it. I have found a schematic of the ESP12-E NodeMcu board, to which I have connected the sensors (DHT22, CCS811 and PPD42). Can you confirm if it is correct and would it work? Is there any way to verify or simulate it? Link: [https://easyeda\.com/editor\#id=\|b135b577d2c24b52a16c00e6fe30ee29](https://easyeda.com/editor#id=|b135b577d2c24b52a16c00e6fe30ee29) Thanks!

Chrome 89.0.4389.90 Windows 10 EasyEDA 6.4.17

Markus_ee 3 years ago

Hi! I think google picture search might help you with finding out the wiring schematics. You can start with search words: esp 12 sensor connection I think you can't really simulate ESP modules which leaves you to do some trial and error methodology. I think I have sent you a PM a few days ago about if you want me to do some of the work for you. -Markus

Chrome 89.0.4389.90 Windows 10 EasyEDA 6.4.17

Markus_ee 3 years ago

@oscarfuentes99.of Hi Oscar! I sent you a new PM. The Easter holidays starts now here on my country and I have plenty of time for those who need my help on their PCB projects. So, please don't let this opportunity to slip out of your hands :-) -Markus

Chrome 89.0.4389.114 Windows 10 EasyEDA 6.4.19.3

Markus_ee 3 years ago

@oscarfuentes99.of Hi Oscar! Haven't heard about you in 2 weeks. Are you alright? I would really like to help with your project.... -Markus

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