jimmie
Senior Member

Thank you @AndyA. My strings are all constant length. Also, 8MB is so large for my needs.

I will add code that converts my string array to an array of character array so I can store it in PSRAM. My knowledge of Arduino strings is limited so I will do some reading on it. Thank you Paul and @defragster.

I meant that my board has the PSRAM chip installed. When using const int BUFFER_SIZE = 200; EXTMEM String circularBuffer; or const int BUFFER_SIZE = 200; String...

Thank you Paul. Did you mean with EXTMEM?

Thank you @defragster. I made the change but there is no difference so it is probably not called by my code. Do you think using UDP may help? Thanks.

Hello @defragster, Please forgive my newbie question. Should I be using a EthernetUDP instead of EthernetClient client? If I continue to use the EthernetClient, how do I use...

Thank you very much @defragster. I will try it.

I wrote the attached code to interface to that sensor. The code is a modified example from the QNEthernet library. As a way to check for consistent operation, I calculated the time between each update. It should be...

Thank you. Definitely worth investigating.

Thank you @clinker8 I have no objections to UDP. I am just not sure if the option is available…

Thank you! This is encouraging news. The QNEthernet library is what we are using due to its stability. I realize that TCP is a bit more "wordy" than UDP but there is some hope in that we only need to read...

Thank you @defragster for taking the time to read the document. You are correct, the data is way more than 4000 bytes/sec. I estimated this number from a PC DLL implementation but it is incorrect. Each reading...

Thank you @defragster. The device is a rotating laser which sweeps from 0 - 270 degrees at 150 Hz. The angular resolution is 0.75 degrees. So, for every 0.75 degrees between 0 - 270, the sensor outputs the angle...

Thank you Paul.

@Taymar I am not using an RS232 plug but the resistor needs to be between the Can H and Can L lines on the Teensy side. In my installation, I am using a Waveshare Can module connected to my Teensy. So the...

Thank you very much PaulS, defragster and Bricomp or the detailed answers. If I use 2 Schottky diodes, which diode?

It does not hurt to swap the H & L lines as PaulS is recommending. On the 120 Ohm issue, the resistor needs to reside on both sides per the link I sent before .... In my case, the circuit was working at lower speeds...

I had a similar issue. The library can work at speeds of 1000 Kb but I am using 500 Kb. The reason you may not be getting an output from the bus was resolved in my case my adding a 120 Ohm resistor across the Can...

Thank you very much Paul. This code is very helpful. I was not aware that one can add memory to the Teensy 4.1. I prefer to read the entire stream because I need to extract some limited information from it before...

Thank you. I did not realize that one can stream directly without first saving the String. So, in this case, one would send each byte as it is received? Is there any example code? Thanks again for your time.