All Questions
14
questions
-1
votes
1
answer
165
views
PIC16f RS485 reception ok, transmitted data incorrect
I am currently working on a RS485 communication, I use a PIC16F18855 and a THDV1505.
I communicate with my computer using a USB/RS485 converter.
The PIC receives the data well, but I have a problem ...
- 41
0
votes
1
answer
75
views
Long Range (100m) USB(PC) to USB (microController USB module) Communication
I have a system that communicates between PIC32MX250F256D (USB module) and PC via USB (2 meters apart). And I need to increase the range of this communication to 100 meters. Due to typical 5m limit of ...
- 171
1
vote
1
answer
177
views
PIC18F26J50 serial communications over RS485 link
I'm trying to figure out why my serial communication is not working. The design is to use the UART of a PIC18F26J50 over a RS485 link. Here is the relevant part of the schematic.
Other relevant info:...
- 163
1
vote
1
answer
1k
views
RE: Receiver Output Enable and DE: Driver Output Enable pins
Hello I am planning to use LT1785 UART-RS484 transceiver. I will use that chip in order to get RS485 data and convert it to UART signal. So I have read the datasheet but I couldn't be sure. It says
...
1
vote
2
answers
2k
views
Rs485 to UART convension
I need to send data from one PIC to another PIC by using RS485. As a protocol I use UART. However, I cannot be sure about RS485 transceiver and its circuit. I will be able to supply 5 V and according ...
0
votes
1
answer
2k
views
ModBus Timeout Error
Anyone very experienced with Modbus & RS-485???
My task is to control a DC motor using micro PIC24.
The motor setting like the angle, delay, start/stop, duty cycle, etc will be sent from PC using ...
- 37
0
votes
3
answers
670
views
UART on dsPIC33EP512MU810
I want to continuously transmit the data on the UART2 of my dsPIC33EP512MU810
. UART2 Tx ...
- 151
-1
votes
1
answer
3k
views
Rs485 receiving problem in Pic microcontroller
I started to work on Rs485 (Sp3485c) which is interfaced with Pic24fj128ga202 microcotroller IC. This controller has 4 uart's one is connected to pc through max3232 ic ,gps,gsm and another for rs485....
- 131
4
votes
1
answer
589
views
RS485 not working in pic24fj128ga202
I would like to send and receive data between two PIC24F microcontrollers via RS485. Here i'm using SP3485 IC. I've set one microcontroller as
transmitter and another one has receiver. My ...
- 91
2
votes
1
answer
1k
views
Showing junk data in RS485 Protocol using pic24f?
I am working on Rs485 protocol using PIC24f microcontroller and sp3485c as rs485 transceiver ic . I have kept one pic as master and another pic as slave .
when i am transmitting any data from master ...
- 131
1
vote
2
answers
2k
views
PIC24F UART Rx Interrupt not firing
I am currently trying to write code for a 48 channel DMX controlled dimmer using a PIC24FJ32GA002. Using a scope I have confirmed that there is a DMX signal reaching the Rx pin of the UART which has ...
- 131
-1
votes
1
answer
3k
views
MicroC rs-485, pic16f887 String sending problems
How can I send the string "test" from a master pic to a slave?
I'm using MicroC RS-485 library example:
http://www.mikroe.com/download/eng/documents/compilers/mikroc/pro/pic/help/rs-485_library.htm
...
6
votes
2
answers
6k
views
Networking options for multi-node Star topology
I want to create simple network consisting of 1 master and up to 16 slave nodes. Project will be based on PIC MCUs.
Network has the following specs/requirements:
Relatively low speed
Inexpensive
...
- 163
2
votes
7
answers
1k
views
Communicating between PICs over 30 feet
I have a PIC24F based device that normally connects to a PC via USB. The device can be controlled through PC software this way. I want to add an optional hand control box that can also be plugged into ...
- 3,745