After I posted this video of the single
channel ESP8266 ESP-01 WiFi relay with FLProg, a lot of people found it very
easy to use for home automation. So, I ordered this two-channel ESP8266
ESP-01 relay module from Aliexpress. Since it will take a couple of
weeks before it is delivered, I am going to make one with what I currently have. The two relays can be operated independently with
the RemoteXY app like the single channel one.
I have here the regular 5-volt 2-channel
relay module with an opto-isolator. An ESP-01 adapter module that regulates
5 volts connected to the VCC and GND to 3.3 volts required by the ESP-01.
The other two pins are the TX and RX pins, which we will use to control the relays.
The ESP01 module itself will go into the 8-pin header on the board.
And of course, a 5-volt power source So here is how they come together.
The TX and RX pins on the ESP-01 adapter module go to the IN1 and
IN2 terminals of the relay module. A 5-volt DC power supply goes to
the VCC and GND of both modules. Two lamps are connected to a 110- or 220-volt
AC power supply live and to the respective NO1 and NO2 terminals of the relay module.
The COM1 and COM2 terminals are then connected to the AC power supply neutral line.
But before the ESP-01 is left on the adapter module, we will plug it into the ESP-01
programmer and program it with FLProg.
Let us start the programming in Remotexy.com.
First of all, configure the Wi-Fi access point, select the ESP8266-based board, the
Wi-Fi on-chip module, and the FLProg IDE. Set the smartphone orientation view to horizontal. Drag two labels to the screen and change
their text to RELAY 1 and RELAY 2. Place and resize two edit fields below the
labels and change their input type to Integer. Place three push switches
below the first edit field.
And another three push switches
below the second edit field. Then set their default display status to OFF.
Select the first push switch and
change the draw-type to ellipse. Also, change the switch-off caption to OFF DELAY. Do the same for the push switch
below the second edit field. The next two sets of push switches should
also be changed to ellipse draw type. But their switch on caption should be ON DELAY.
The final set will have their switch-on caption as BLINK ON and their
switch-off caption as BLINK OFF. You can resize and rearrange
the elements as required. And that will do, just click on the get source
code button to copy the code for FLProg IDE.
In FLProg, I will create a new
FBD project for the ESP-01. And enable the Wi-Fi access point with 2CH ESP01
RELAY network name and IP address of 192.168.0.1. I will bring in the RemoteXY block.
And paste the RemoteXY code here. Just make sure that the push switches in the
output window are arranged in ascending order. Now, I will bring in two timer blocks,
a generator block and an OR block.
The first timer block is changed to an off-delay
timer type with an external delay input. The second timer block is left as an
on-delay timer with external delay input. While the generator type is set to a symmetrical
multivibrator with external pulse length input. The EN inputs of the blocks are then
connected to the push switch outputs 1, 2, and 3 of the RemoteXY block. While the delay inputs of the
blocks go to the edit_1 output. The OR block input should be increased
by one and connected to the outputs of the timers and generator blocks.
Now, I will duplicate these blocks and connect them to the remaining
inputs of the RemoteXY block. Finally, I will create two digital relay output
tags for the TX and RX pins of the ESP-01. And connect them to the output of the OR blocks.
In compiling the project, the file size mapping defined by hardware and sketch option should
be selected, the reset method should be set to dtr (aka nodemcu), and the COM selected
before the code is uploaded into the ESP-01.
Now we can insert the ESP-01 back into the
adapter module and power up the circuit. Notice that both relays click and the lamps
blink once when the board is powered up. This is caused by the ESP-01 during booting. If you don’t mind that, we can go
ahead and connect to the RemoteXY app.
Connect your smartphone to the ESP-01 hotspot,
open the RemoteXY app and add a new device. Select Wi-Fi point, input 6377 as the
port number, and connect to the ESP01. Oops! we can only use the free
license version of the app for just 30 seconds because we have used more
than five elements to make our interface. We will have to activate the Pro version
to use an unlimited number of elements. Here we go. When you buy the Pro license, the
30-second time limit is removed. You can independently set the
delay values for each relay. And operate their off delay, on delay and blink buttons. Now, we have the 2-channel ESP-01
relay operated with the RemoteXY app. Thanks for watching.
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See you in the next video.
