Systems analysis was performed to develop knowledge-based control systems (KBS) for single stem rose production. This system can be easily adapted in other agricultural facilities such as greenhouses and silos. The performance of system was evaluated for 2 weeks and the results were quite satisfactory. Consequently information can be easily and reliably transmitted, monitored and/or controlled by the two machines. Sockets are configured to listen to a data port or to connect and then transmit to a remote one. Winsock is used for network communications via the TCP/IP protocol. Internet communications is relied on socket programming. They use VB MSComm control in order to communicate with the microcontroller. Both the client and the server side programs are coded in VB programming language. Microcontroller transfers the sensors data to the server via serial port. The required hardware include a microcontroller and accompanying electronic circuitry, a server computer, serial port, temperature and relative humidity sensors and two actuators. The various stages in the design and implementation of system for monitoring temperature and relative humidity and controlling HCS environment conditions are presented and discussed. i.In this article, a distributed architecture that allows remote control and monitoring of horticultural cool storage (HCS) is presented. It works, but I only get part of the string. LngStatus = CommOpen(intPortID, "COM" & CStr(intPortID), "baud=2400 parity=E data=7 stop=1") The string appears on my form, but that is as far as I get. Get to the exit do line, therefore stays in an endless loop. When I run it, and send the string "ST,+00009.28 g" it never seems to I think I am getting close, but have one hurdle that I cannot seem to solve. LngStatus = CommSetLine(intPortID, LINE_DTR, False)Īgain, thanks for helping me out, we are close I think. LngStatus = CommSetLine(intPortID, LINE_RTS, False) LngStatus = CommRead(intPortID, strData, 64) ' Read maximum of 64 bytes from serial port. LngStatus = CommWrite(intPortID, strData) LngStatus = CommSetLine(intPortID, LINE_DTR, True) LngStatus = CommSetLine(intPortID, LINE_RTS, True) LngStatus = CommOpen(intPortID, "COM" & CStr(intPortID), _ What am I doing wrong? Can someone help me put this together to read data from a serial port? I don't need to write, only read.ĭim intPortID As Integer ' Ex. It, it says "Sub or function not defined" on the "lngStatus = CommOpen(intPortID, "COM" & CStr(intPortID), "baud=9600 parity=N data=8 stop=1")" line. I did that as the first line after the 'Initialze Communications line. 'intPortID = 1" somewhere to set that variable to com1. I assume that I would need to add some code, i.e.
Excel vba serial port mscomm control code#
Not being very familiar with this routine, I downloaded the following code andĪdded it to a button on a form.
So, I found a suggestion from someone that I handle serial communications with API calls. I have sort of come to the conclusion, that I need to take another route. I have worked on a solution for days and had a lot of help from other forum participants. After replacing the mscomm control with the new control, following the suppliers instructions to the letter, it works, but when I close one of the forms containing the newly added control,Īccess crashes. I found a control that is supposed to replace the mscomm control.
Excel vba serial port mscomm control windows 7#
After moving to access 2007 and windows 7 of course, the mscomm control no longer works. It uses a MSComm control to read data from a scale. I have a legacy access 2000 database that has been in successful use for over 10 years. This is actually a continuation of a post already started relative to serial communications.
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