ESP32 Forum

I want to connect a Honeywell Vuquest 3330 to an ESP32 (D1 Mini or Dev Module). The idea is to process the scanned barcode data and trigger several other pins based on the process result. I am just not 100% sure how to go about creating the connections.

I have a USB to 15 Pin D-type cable that I am currently using connect the scanner to a PC, and in my mind it should be a similar connection.

From the Vuquest 3330 documentation (attached), 5V should be sufficient to power the scanner if I connect the VIN pin of the ESP32 (will be powered by USB) to pin 11 of the 15 Pin D-type connector (pg 202 - Serial Output), ESP32 GND to Pin 6 of the D-type connector, RX-TX(pin 7), TX-RX(pin 8)... seems simple enough. I know the ESP32's HIGH value is about 3.3v, so would I need a TTL converter?

I was thinking of using a normal Ethernet cable to connect the ESP32 and the Vuquest, about 1 meter in length.

Anybody have any suggestions or warnings before I attempt this?

Thanks in advance.

I wouldn't assume that thing uses 3.3V IO... possibly best to measure its TxD when the scanner is on but idle. You should measure either a negative voltage (in which case the signal levels are RS232 and you need something like a MAX3232 to do voltage conversion), 5V (in which case you could try either a 5V->3.3V level converter, or simply a 4K7 resistor in series with the scanners TxD),or 3.3V (in which case you can have a direct connection).