Questions tagged [rs232]
it refers to the standard for serial communication transmission of data.
59 questions
1 vote
1 answer
90 views
Interpreting Analog Output from Aalborg Mass Flow Meter GFM
I am attempting to connect this device to my computer via RS232. I am debating the simplest way of going about this and was inquiring if my Uno R3 could come into use, turning the analog symbols of 0-...
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1 vote
1 answer
842 views
Communication between two ESP32, USART vs RS232 with MAX3232
I have two ESP32 that are communicating via USART (TTL) on the Serial2. The TX2 pin of ESP_Alice is connected with the RX2 pin of ESP_bob. The RX2 pin of ESP_Alice is connected with the TX2 pin of ...
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1 vote
1 answer
124 views
Having issues with RS232 UART wiring to a physical PC connection
TL;DR: Attempting to connect UART2 on ESP32-WROOM to a physical PC RS232 results in odd behavior and ESP32 crashes or errors. Suspect electrical design problems. Wondering if I need special ...
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1 vote
0 answers
73 views
Incorrect HEX code from DMM IR RS232
I have an Amprobe 38XR-A (sometimes seen as a meterman), these DMM's have a IR RS232 port on top and transmit a HEX code. Using the official cable I get a hex value of: 08000400500A0 I am attempting ...
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4 votes
2 answers
201 views
Arduino unable to read 0x41 and 0x42 (reads others just fine (ICT bill acceptor)
Here is my issue: My code successfully recognizes and accepts $1 (0x40) and $20 bills (0x43), but it fails to recognize, display, process, anything for the $5 bill (0x41), and $10 bills (0x42). Also, ...
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1 vote
0 answers
149 views
Communication with scale via rs232
I need help with an Arduino project. I want to read values from a TCS150 scale using the serial port. The hardware I have is an UNO R3 board and a MAX3232 level converter. I have connected: MAX3232 ...
-1 votes
1 answer
65 views
I cannot communicate using RS232 between Arduino and Lakeshore Fluxmeter. How do I get data back from the fluxmeter?
I am using an Arduino Leonardo and the DFrobot RS232 shield to try and communicate with a flux meter. I am trying to write "UNITS?", which would have the fluxmeter send back a single byte ...
2 votes
1 answer
1k views
Using Arduino to read and write data to RS232 device
I have a micro turbojet engine (JetCat P100-RX) which is operated through an Electronic Control Unit (ECU). The ECU has a lot of information about the engine. I want to access that information and ...
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2 votes
1 answer
2k views
Read serial with header and end marker
I am trying to use Topway display for HMI lcd with Arduino. This display using RS232C protocol at docs it has a "Communication Packet Structure" like this. So my query should start with AA ...
- 297
5 votes
2 answers
19k views
How to read from and write to rs232 device from/to Arduino
I would like to read data from a rs232 device (SL-5868P Sound Level Meter). protocol and more : https://sigrok.org/wiki/Colead_SL-5868P. I already have a Python script to read the data with a TTL to ...
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1 vote
1 answer
124 views
Joy-IT RS232 Shield and RS232 voltage levels
First of all, sorry if this is a dumb question, but I'm pretty new to the whole Serial RS232 concepts. I do have an Arduino Board that, from what I read about, is not able to communicate via RS232 ...
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1 vote
1 answer
389 views
Send data to Programmable Power supply from Arduino by RS232
I have a programmable power supply, which has serial communication port. If I send a string "VSET1:11.00" then power supply will be set to 11.00V. But, I need to write a program which will ...
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1 vote
0 answers
2k views
How can i read and write the data from a Delta plc-s series through Arduino UNO?
I am trying to communicate PLC with arduino through rs232 as well rs 485. But, I am not able to read and write data. I can observe the data in PLC through ladder logic but not in arduino. I am trying ...
-1 votes
1 answer
376 views
Reading data from an Ohaus Defender 3000 with a RS-232 shield
I have a project where we have to read the weight from an Ohaus Defender 3000 by using an Arudino Mega 2560 and a RS-232 shield. Right now we have the RX of the Arduino to the TX of the shield, and ...
1 vote
1 answer
1k views
Flow control between ESP32 and RS323 device
I'm trying to communicate an RS232 device with an ESP32 (Heltec Wifi/LoRa 32 v2) my problem is that I don't receive any response from the device, doing some research, I'm thinking that the trouble can ...
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