Hello guys and girls.
I've just received my BV4115 and started playing with it. I configured the wifi and connected it to an 8-relay board I already had (the classic one, bought from ebay). I soldered the pads on R3 and R5 and V/G G/V accordingly. I was able to connect using 3 programs on Windows (bvserial, wifirelay and wifirelay GUI) but was not able to control the relays.
After many tests, I accidentally entered the +++rr command in bvserial and everything worked fine!
As far as I have tested, I cannot operate the relays until I enter the +++rr command, everything works fine after that. Even the dV and dD command do not produce an output until +++rr is entered.And after a reboot, I have to enter it again.
So, I would like to ask if anyone knows, am I doing something wrong, is this a bug or is this the normal procedure? Because, to tell you the truth, this is my first attempt and I really couldn't figure out what the +++rr command actually does.
Any help would be really appreciated. Thank you in advance.

hello,
the bv4115 consists of a wifi device and a microcontroller so there are two sets of commands. The microcontroler commands begin with 'd', e.g. dV and the wifi commands begin with +++.

The command you entered +++rr will send a reset to the microcontroller and that is what is happening. A description of the commands is at the top of the documentation in a link called 'Details' near [2*] or the link here

Depending on the circumstances at switch on the BV4115 microcontroller part will require resetting with +++rr. After that everything will work fine as you have discovered. The reason why this command is not automatically sent by the software is because the relays would switch to the default state which is off.

As an example suppose that the relays are connected to power a PC and the PC is switched on. When you contact(control) the relays with software you don't want the relays to switch off then on again by sending a reset as this would be bad for the PC. The use therefore is a one time +++rr reset when powering up and there after it stays switched on to control whatever is needed.

Hello jimeer and thank you for the extra fast reply!
Although new to this stuff, I actually had in mind that this could be the case, but I had to confirm it, thus the question to the forum.
Now, to my final and more advanced question. I have read whatever I could find in your site about the commands regarding the BV4115W and what I found is this:
As far as the ESP8266 part, all the commands applicable are described in this link and this link.

About the microcontroller on the board, the only commands I could find are:
da1,0 (to switch on e.g. the first relay in 0 msecs)
da0,0 (to switch off e.g. the first relay in 0 msecs)
do, to switch off all relays.

Are there any other commands I could possible use? Also, is there any way I can store a binary value on the microcontroller, in order to use it in case of a power loss and restore the last state of the relays?

Any link or information would be very helpful.
Thank you again for your assistance.

Hello,
The full list of the command are in the Data Sheet and there is a command that returns the binary value of all 8 relays.

Jim

Thank you again Jim for your reply.
I've got one more thing that came up. As I've noticed, typing the command +++info returns "Firmware version VF1_1.9.0", which as I can understand is the version for the ESP8266 module.
On the ESP firmware update page, there's an "ESP8266_F1_1.7" firmware available. I'm quite confused. Is this firmware previous to the one that my module is already using (1.7 vs 1.9)??? And if not, should I upgrade it?
Thank you for your time and effort.

yes 1.9 is later than 1.7
Jim

HI guys,

I have one problem with BV4115.
When set module as station and connected to network, from "[192.168.4.1];

Mode to set [1] (1 is station 2, is Access Point), set in Satiation Setup
Baud Rate [115200]
Station Setup [URKO, 12345678, 192.168.4.1, 192.168.4.10] (ssid,pass,ip,gateay)
AP Setup [, , 0, 1] (ssid,pass,security,channel)
Sender setup

After pressing button "save changes" wifi relay modul freez.
"Ping 192.168.4.1" is ok, connection from web or application "wfrelay", is not possible.
Then reset relay, connections are ok, until I save setting, or just pressing button update on [192.168.4.1]

Is something wrong with relay card, software or just human mistake?

I am trying to send command (On/Off) to 8 relay CARD, from web page.
I'm looking for test example.

Thank you,

Urko

Do you have a wifi home network? if so what is the IP address of that network?

Hi,

WIFI router is:192.168.4.10
BV4115 is on 192.168.4.1
PC is on 192.168.4.210

ping 192.168.4.1 is 160-205ms

Maybe help this Error in app "wfrelay":

Connnecting to 192.168.4.1 Port 80
Traceback (most recent call last):
File "<string>", line 39, in btnConnect
File "D:\C\Python\PyInstaller-2.1\wfrelay\build\wfrelay\out00-PYZ.pyz\BV4115W"
, line 95, in wfCheck
socket.error: [Errno 10053] An established connection was aborted by the softwar
e in your host machine

From URL 192.168.4.1 - Not responding

-- Just for information: there are no bugs in wifirelay or the BV4115 firmware --

Your router may be blocking the MAC address from the ESP8266 or the ESP8266 is wrongly configured for your system do the following:

open a cmd window and type:

telnet 192.168.4.1 80

then type

<enter><enter>+++info

The <enter> is the enter or return key on the keyboard.

What is the output? (**** remove the SSID and password before sending for your own security ***)

Thank you for fast replay, very kind of you.

If just open cmd and write down telnet 192.168.4.1 80, nothing happend (black screen after few second return to cmd)
After button restart on BV4115, and repeat telnet command i get:

Firmware version VF1_1.9.0
Chip ID: da8109 Flash ID: 1640e0 sys Flag: f0
Current Device Sockets:
remote port 51697
local port 80
local IP 0.0.0.0
remote IP 192.168.4.210

Mode is 1 (STATION)

Station mode the following applies:
URKO 12345678
192.168.4.1,192.168.4.10,255.255.255.0
Port 80
---------------------------------
AP mode the following applies:

<ssid><pwd><chan><authmode>
"","",1,0
Connect to 192.168.4.1 Port 80

That's good it means that everything with the ESP8266 is configured correctly.

from the telnet session you can type
<enter>+++rr
That will reset the BV4115 which it sometimes needs at first switch on.

to verify that the relay bit is working type
dV<enter>
This will return the version firmware

da1,1 should switch on relay one and
da0,1 will switch it off

** depending on the situation, at first switch on the BV4115 will need a reset as above before wifirelay will work. For further information about this see the end of the text at http://www.byvac.com/index.php/BV4115

Hi,

After telnet +++rr, situation is worse :)
Now when I connect with telnet, everything is black
***info -> nothing happend or black screen,

After quick button reset, same situation.

Test from application wfrelay, sometimes work, sometimes not. (same from the beginning)
I need to wait for an hours to establish connection.

I can use this modul just for occasionally test :)

I will try again hard reset and leave default setting...maybe is firmware?

Thank's

After hard reset and setting BV4115. I leave "Ap setup" fields cleared to null.
Now i communicate with module from telnet.
I will testing how long could be connected, without resetting modul.

Thank u,
Urko

It sounds like the wifi signal is weak where the bv4115 is situated.

There is also quite a good utility tool here (better than telnet): http://www.byvac.com/index.php/BV4115#options Unzip the file in Method 2 and change the wifiinfo.txt to 192.168.4.1 in your case.

Thank's.

Router is about 1m away from module.

I'll try everything and notice you about my progress.
If everything will be fine (stress test 24/7), I'll write you for next step of our cooperation.

Best regards
Urko