4 Esp12-E WiFi PC boards for DIY IoT SmartHome Makers


OneTrick is an Esp12-e WiFi 125Vac @ 2Amp Form C relay,

controlled by GPIO 12
intended for Runner legs and Commuter leg
of standard 3-way switch legs.
GPIO 4 and 5 INPUTS have 2k2 pullup resistors.
The DC input SWITCHING regulator takes dirty DC
from +7.5 <+36Vdc, and provides 2A clean 3v3 power.
Designed to fit inside a standard electrical wall switch box.

Allie is a WiFi 277Vac @ 16Amp relay

controlled by GPIO 2.
Panasonic Ale relay has top mounted 20Amp StaKon tabs
GPIO 12, 13, 4 and 5 are INPUTS
connectorized to an RJ45
and pulled high by a 2k2 pullup resistor pack.

BlindBird is a DC motor control for blinds, gates or draperies.

GPIO 4, 5 with 2k2 pullup resistors, intended for limit switch inputs.
GPIO 2 controls DC polarity (relay) motor direction
GPIO 12 controls Motor On/Off via TIP120 transistor
For motors up to +30 volts, or 60 watts, or 2Amps

The Blackbird is a WiFi Dual dual I/O,

GPIO 12 and 4 are intend as limit switch inputs with 2k2 pullup resistors,
but can be used with motion PIR, smokies, Co alarms, mag contacts…
GPIO 2 and 5 are +V outputs driven by 2N2222 transistor
Relays, solenoids, motors, valves, gates- up to +30Vdc / 1Amp / 30 watts.

Download the .pcb CAD file by clicking:
PCB designs viewed and ordered online using
http://expresspcb.com CAD free software


Yikes! Bad PC board design-
Don’t build!
Mistakes- accidentally ran my transistor protection diodes to GND, when they should be from +Vcc to the transistor COLLECTOR. My bad.

Also, I used GPIO 2. BAD mistake. When GPIO 2 is pulled low on boot, the ESP looks for an internal memory. Not finding the memory- the ESP fails to boot.

I’ll post a re-design.
BUT- These PC boards are pretty much hosed.
THAT cost me $200. Ouch.

-The “One Trick” board works fine.
BlackBird is a total loss.
BlindBird works if you cut the pc trace to GPIO 2, then re-route to GPIO 13.
Allie works if you CUT pc trace to GPIO 2 and reroute to GPIO 12 or 13.

My bad.

the project was really interesting, have you made some update?

great project , which EDA you have used?
what is the dimensions of the board in mm?
i am very interested on the WiFi 277Vac as it can support u to 16A but what about the trace width is it enough?

looks interesting please have a look at my own board here on forum
or at my Github

Why is that?

Dear friend,

give me the link to the board and to the project to see.
Can I order from somewhere?

That’s funny. Cause Blynk community is 3 times bigger.

Maybe you didn’t interested Blynkers enough :)?

what’s the sense of deleting your own post? O_o

The only issue I had when I saw this was that it’s been done years ago and you can get these types of boards from China for a couple of bucks. Seems like you’re reinventing the wheel.

@Jamin you are right but not always the price is the key , i have done my own PCB design for ESp8266
for many reasons like

  • you want to learn how it’s done!!
  • you need a customized version which suit your requirement ( dimensions , number of outputs , relays etc.)
  • the surprise it’s not always expensive my EgyIOT PCB cost almost $15 with 3 relays and 3 channels PWM which still affordable and fitting in normal electricity wall box.

i hope you see it and give me your opinion

1 Like

WHERE can order this board ??? Working link please

@mikekgr the OP has left the Community like he left Cayenne and a.n.other.

The design is at https://drive.google.com/file/d/0B7nV2DFTXjjMd21tbmlGM255ZW8/view and the boards can be ordered from https://www.expresspcb.com/expresspcb/

Download their software and then plug in the pcb design done by the OP. Ensure it is the correct design as the OP states his first design was trash. For the next few hours you can still read his rubbish on this site by clicking the posts he deleted and looking back through the history.

I would look at the designs by @scropion86 if I were you.

Thanks Costas for your answer.
I fast saw his design and I found it good ( I did not analyzed deeply tho ).
The strange thig is the disappearance of the creator…

Thanks and Best Regards,
Mike Kranidis