Hello,
My customer has an industrial scale that communicates with external systems via a RS232 port. To obtain the weight measured by the scale, a command is sent to the scale controller via rs 232, then the scale sends us the measured weight as a response (see diagram).
My question is: is it possible to use the Industrial IoT Wireless RS232 Modem, SKU: PR55-28’ to communicate with the scale controller ? I would like to be able to send a read command to the wireless scale controller via the modem and then the controller would send me the weight still wirelessly via the modem. The modem and the scale controller would be connected together with a rs 232 cable.
If possible, how should the rs232 wireless modem be configured? How to exchange data between the wireless modem232 and a USB wireless modem that would be connected to a PC using Node-Red as control software?
Hi Bert,
The RS232 modem can be used for this application. You will need to set the wireless module in AT mod. it can be done using XCTU or we can do it.
from the PC side you can send serial data wrapped around Digi API.
this user is ding something similar
Great! Can you provide the node red flow configuration for this?
I would like to be able to poll a scale to get the information on a period basis vs. it reading on a continuous basis. this is to control the volume of data transmissions.
i.e. send a print meessage to the scale to get the values.
Hi @danempiric you can configure the NCD RS232 Device using the Wireless Device node (baud rate, stop bit, parity, etc). Then you can use this flow to transmit a RS232 command in Hex to request.
I used the following flow provided but it doesn’t seem to request the values from the device. I lined out the wires so those should be fine. Unless there’s a better way to troubleshoot the issue.
