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Ezb - Uart 0 Not Working

Assistance Requested

Help ptp with their question and receive $10 of EZ-Credit to get more robots and parts from our store. The following information was provided about their previous efforts searching tutorials for a resolution.

Product: (click to view product details)

EZ-Builder Control: (click to view manual page)

ptp claims to have checked these sources:
 
#1

DJ/Jeremie

EZB4 v2 (MXCHIP) UART 0 is not working please advise ?

Connection Information:
User-inserted image

Wiring:
EZB4 v2
TX - Orange
RX - Yellow
GND - Green

User-inserted image

SparkFun FTDI Basic Breakout - 3.3V
https://www.sparkfun.com/products/9873

EZ-Builder screen:
User-inserted image

I can connect to EZB, but it crashes when i try to access the UART #0


SAME SETUP WITH EZB4 V1 (Blue Giga)

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EZ-Builder / Desktop Communication App (Putty) OK:

User-inserted image

Notes:
1) Is not clear but only 3 UART pins are connected (GND, RX, TX)
2) The problem is not the FTDI board, i tried two more with different chipsets.
3) IT's not working with 3 x EZB4 V2 (MxChip)
4) IT's working with 3 x EZB4 V1 (Blue Giga)

I have found a few conversations, tutorials and activities that may help with your question. Take a look at these links. I've sorted them by what I believe to be most relevant but that is not always the case as I'm still learning.


Also, consider reviewing the Learn section for informative lessons and activities. Check it out!


#2

The /2 you mention mxchip, which is not a developer of ezrobot. It's a wifi module - so it's similar to referencing the product by a capacitor or resistor manufacturer that exists on the /2. The manufacturer of the component has no relation to the code. The code is ezrobot and not mxchip. They will not be able to support this reported question.

I believe what you're saying is the test works work the /1 but not the /2?

I use the uart #0 daily, more so in the last few months while we're finalizing development of the ezrobot lidar. I haven't experienced any issues. So let's start by getting a details of what's going on...

1) Can you expand on what your test entails regarding data, baudrate and project configuration? The ezb has an input buffer - which is defined in the datasheet and I can't remember the size offhand, but it is pretty big.

2) crashing? If EZ-Builder is crashing, what is the error?

3) telnet into the /2 and report the firmware version to me please

Offhand I can't think of a possible correlation between the uart and /1 and /2 wifi antennas.

#3

Quote:


I believe what you're saying is the test works work the /1 but not the /2?



Correct (I mentioned mxchip to point to a EZB /2)

Quote:


3) telnet into the /2 and report the firmware version to me please



User-inserted image


The setup/test steps to reproduce the problem:

1) Connect FTDI board to then EZB UART #0 (GND, TX, RX) Picture
2) Connect FTDI board to USB port/USB cable/Desktop
3) Power on EZB (12 v power source)
4) EZB successful connects to the WIFI network (client mode) / green light
5) Start EZBuilder
6) Successful connected to the EZB

User-inserted image

7) Add Terminal EZB control to an empty/new project

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EZB disconnects automatically.

debug window content:

Code:


Setting i2c rate: 100000
EZ-B voltage is 12.309577158
EZ-B temperature is 25.39318697205904656C
Connected
Comm Err: System.IO.IOException: Unable to read data from the transport connection: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond. ---> System.Net.Sockets.SocketException: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond
at System.Net.Sockets.Socket.Receive(Byte[] buffer, Int32 offset, Int32 size, SocketFlags socketFlags)
at System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32 size)
--- End of inner exception stack trace ---
at System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32 size)
at EZ_B.EZB.f9xEF7cNHr(Int32 , Byte[] cmdData)
BbytesToExpect: 5000
?
Received: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 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0 0 0 0 0
Disconnected



8) Connect again (success), focus on the Terminal EZB and again:

Code:


0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Disconnected
Attempting connection on 192.168.18.55:23
Connected to 192.168.18.55:23
Reports EZB v4 OS With Comm 2
EZ-B v4 ID: 47-54-0-0-48-255-57-58-58-37-37-37
Setting battery monitor voltage: 7
Setting battery protection: True
Setting i2c rate: 100000
EZ-B voltage is 12.267090384
EZ-B temperature is 25.55123585362787880C
Connected
Comm Err: System.IO.IOException: Unable to read data from the transport connection: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond. ---> System.Net.Sockets.SocketException: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond
at System.Net.Sockets.Socket.Receive(Byte[] buffer, Int32 offset, Int32 size, SocketFlags socketFlags)
at System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32 size)
--- End of inner exception stack trace ---
at System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32 size)
at EZ_B.EZB.f9xEF7cNHr(Int32 , Byte[] cmdData)
BbytesToExpect: 5000
?
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0 0 0 0 0
Disconnected



Sometimes EZ-Builders freezes for a few seconds before/after the error/disconnect

#4

Interesting... what data is putty transmitting when it disconnects? I.e. Are you typing text into the putty window?

#5

Nothing, the COM port is available but i didn't started Putty.

#6

What happens when you load the terminal program without any wires connected to the uart 0?

#7

@ptp... Try initializing the port first... I have had a similar problem with the ssc-32 boad using the comm2 ezb4... Had to initialize the port even though the ssc-32 control was added to my project... If I didn't ez builder would lock up and the ezb4 had to be rebooted...
Run this separately in a script...

Code:


UARTInit(0, 0, baudrate)

#8

So, I just want to point out that DJ said EZ-B Lidar testing.

Drops Mic

Alan

#9

....

User-inserted image

#10

Hey,

DJ/Richard R, I'm away from my "batcave" so no EZB, I'll back soon to more tests.

DJ:
I want an office / Batcave with a view like that Smile