We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Small green circuit board with Grove connector and DB9 port

Seeed Studio

Seeed Studio Grove RS232 Transceiver Module

SKU CH-K0X9-XCZFR

Grove-compatible RS-232 transceiver based on MAX3232, supports 3.3 V or 5 V supply, 250 Kbit/s maximum data rate and ±15 kV ESD protection

  • TypeSensors
  • Plug-and-play Grove interface simplifies MCU-to-PC serial links
  • Max3232 transceiver delivers up to 250 Kbit/s data rate
  • ±15 kV HBM ESD protection shields the RS-232 bus
  • Low 0.3 mA supply current suits battery-powered designs
  • Wide -40 °C to 85 °C operating range fits industrial environments

RS232 Transceiver for MCU Communication

This Grove module converts MCU logic levels to RS232 voltages, enabling serial links between microcontrollers and legacy equipment. It suits engineers maintaining industrial gear, retrocomputing hobbyists and students learning serial protocols.

Plug-in Grove interface eases wiring

The board mates with any Grove base shield, so no soldering or breadboarding is required. Miswiring the DB9 gender or exceeding the receiver input range of -25 V to +25 V are the common pitfalls that halt communication.

Handles 300 bps to 230400 bps over short cables

At 3.3 V or 5 V supply the transceiver draws 0.3 mA idle and meets TIA/EIA-232-F with ±15 kV HBM protection. Long cable runs or electrically noisy environments will exceed the 250 Kbit/s maximum data rate and corrupt frames.

Highlights

  • Plug-and-play Grove interface simplifies MCU-to-PC serial links
  • Max3232 transceiver delivers up to 250 Kbit/s data rate
  • ±15 kV HBM ESD protection shields the RS-232 bus
  • Low 0.3 mA supply current suits battery-powered designs
  • Wide -40 °C to 85 °C operating range fits industrial environments

Specifications

TypeSensors

Questions about this item

How do I verify the module is working after connecting it to my Arduino?

Confirm communication at your chosen baud rate up to 230400bps and check that the MAX3232 transceiver establishes a stable serial link between the MCU TTL levels and the RS-232 port.

What comes in the box and what extra items are needed?

The package contains the Grove RS232 transceiver board; you must supply a Grove cable, an RS-232 cable or DB9 connector, and a 3.3 V or 5 V power source for the MCU.

Which version should I choose for a 5 V Arduino versus a 3.3 V board?

The same module operates from 3.3 V or 5 V supply, so a single version covers both voltage levels without needing a separate variant.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.