USA
Asked — Edited
Resolved Resolved by DJ Sures!

Ezb - Uart 0 Not Working

DJ/Jeremie

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

Connection Information:

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

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

EZ-Builder screen:

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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:

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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)

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Synthiam
#1  

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 ARC 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.

PRO
USA
#2  

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

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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 ARC
  6. Successful connected to the EZB

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  1. Add Terminal EZB control to an empty/new project

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EZB disconnects automatically.

debug window content:


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

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 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 ARCs freezes for a few seconds before/after the error/disconnect

PRO
Synthiam
#3  

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

PRO
USA
#4  

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

PRO
Synthiam
#5  

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

#6  

@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 ARC would lock up and the ezb4 had to be rebooted... Run this separately in a script...


UARTInit(0, 0, baudrate)
#7  

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

Drops Mic

Alan