RFID Vehicle Access Control & Parking
Plan an RFID vehicle access control system: UHF windshield tags, long-range lane readers, Wiegand controllers and barrier triggering. Lane BOM and samples.
ValenID · valenid.com · sales@valenid.com
GM-130 UHF RFID Reader Module, 33 dBm, UART/TTL, Single Port
Embeddable single-antenna UHF reader engine on the Impinj R2000: 0–33 dBm output, more than 700 tags/s and a 15-pin TTL UART header, in FCC and ETSI versions.
- Impinj R2000 chipset with dual-CPU design for a single external UHF antenna
- Output power adjustable 0–33 dBm; receiver sensitivity < −85 dBm
- Peak inventory above 700 tags/s with a 1,000-tag buffer (96-bit EPC)
- EPC Gen2 / ISO 18000-6C plus full ISO 18000-6B read/write
- TTL UART at 115200 or 38400 bps; 2 GPI + 2 GPO at 3.3 V level
- Frequency
- 860–960 MHz (US or EU version)
- Output power
- 0–33 dBm
- Antenna ports
- 1
- Interface
- TTL UART
- Read range
- 5 cm – 20 m (antenna/tag dependent)
- Power
- 3.7–5 V DC, 1.2 A
Reply within 24 hours Tested before dispatch Worldwide shipping
UHF RFID Reader Module, 33 dBm, UART/TTL, Single Port: overview
The GM-130 UHF RFID reader module is a single-port, 33 dBm EPC Gen2 engine for OEM engineers who need one read point inside their own enclosure: a vehicle-lane reader, a kiosk, a label printer or a smart shelf. It is based on the Impinj R2000 chipset with a dual-CPU design and reports to your host controller over a TTL UART.
One external antenna connects to the board. Output power is adjustable from 0 to 33 dBm, and the specified read distance spans 5 cm to 20 m, set mainly by your antenna, the tag and the power level you choose. Inventory peaks above 700 tags per second, and reads collect in a 1,000-tag buffer (96-bit EPC) that the host can empty in batches. Tag RSSI, antenna-connection protection and ambient temperature monitoring are built in, and ISO 18000-6B tags get full read/write support alongside EPC Gen2 / ISO 18000-6C.
The transceiver covers 860–960 MHz and ships in two regulatory versions: GM-130-1P-US for the FCC 902–928 MHz band and GM-130-1P-EU for ETSI EN 302 208 at 865–868 MHz. Region plans for China, Japan, Korea, Malaysia and Taiwan also appear in the specification, so state the destination country on your order.
Integration notes
Provide a 3.7–5 V DC rail good for 1.2 A (±10%) and fix the module to an external heatsink, because it depends on that heatsink for air cooling. The 15-pin header carries the UART (115200 bps default, 38400 bps alternative), two 3.3 V inputs and two 3.3 V outputs, a driven buzzer line, an active-high enable and a direction-control pin for an RS485 transceiver. The USB pins are for factory test only. An SDK is available for host-side development.
More features
- Tag RSSI, antenna-connection protection and temperature monitoring built in
- 55.5 × 39.5 × 7.9 mm board in US (FCC) and EU (ETSI) versions
GM-130 specifications
RF & protocols
| Reader chipset | Impinj R2000, dual-CPU design |
|---|---|
| Frequency range | 860–960 MHz |
| Order versions | US: FCC 902–928 MHz; EU: ETSI EN 302 208 865–868 MHz (with or without LBT) |
| Other region plans listed | China, Japan, Korea, Malaysia, Taiwan |
| Air protocols | EPCglobal UHF Class 1 Gen 2 / ISO 18000-6C; ISO 18000-6B (full read/write) |
| Output power | 0–33 dBm, adjustable |
| Receiver sensitivity | < −85 dBm |
| Antenna ports | 1 |
Performance
| Read range | 5 cm – 20 m, depending on antenna and tag |
|---|---|
| Peak inventory speed | > 700 tags/s |
| Tag buffer | 1,000 tags @ 96-bit EPC |
| Work modes | Single-reader / dense-reader |
| Built-in diagnostics | Tag RSSI, antenna-connection protection, ambient temperature monitoring |
Interfaces
| Host interface | UART, TTL level (15-pin header) |
|---|---|
| Baud rate | 115200 bps (default), 38400 bps |
| GPIO | 2 inputs + 2 outputs, 3.3 V level |
| Buzzer output | Driven, > 50 mA |
| RS485 | Direction-control pin for an external transceiver |
| USB pins | Factory test only |
| Development | SDK available |
Electrical
| Supply voltage | 3.7–5 V DC |
|---|---|
| Operating current | 1.2 A ±10% |
Mechanical & environment
| Dimensions | 55.5 × 39.5 × 7.9 mm |
|---|---|
| Cooling | External heatsink, air-cooled |
| Operating temperature | −15 to +55 °C |
| Storage temperature | −20 to +70 °C |
| Relative humidity | 15–90% |
15-pin host header pin definition
| Pin | Signal | Function |
|---|---|---|
| 1 | GND | Ground (connect both GND pins) |
| 2 | GND | Ground |
| 3 | VCC 3.7–5 V DC | Supply input (connect both supply pins) |
| 4 | VCC 3.7–5 V DC | Supply input |
| 5 | GPIO 3 | Output (3.3 V level) |
| 6 | GPIO 4 | Output (3.3 V level) |
| 7 | GPIO 1 | Input (3.3 V level) |
| 8 | BUZZER | Driven buzzer output, > 50 mA |
| 9 | UART_RXD | Serial data in, TTL level |
| 10 | UART_TXD | Serial data out, TTL level |
| 11 | USB_DM | USB D−, factory test only |
| 12 | USB_DP | USB D+, factory test only |
| 13 | GPIO 2 | Input (3.3 V level) |
| 14 | EN | Module enable, active high |
| 15 | GPIO 5 | Direction control for an external RS485 transceiver |
Same header on the 1-, 4- and 8-port versions. Tie both GND pins to ground and both supply pins to the 3.7–5 V rail.
Order codes
| SKU | Antenna ports | Band / regulation | Host interface |
|---|---|---|---|
| GM-130-1P-US | 1 | FCC, 902–928 MHz | TTL UART |
| GM-130-1P-EU | 1 | ETSI EN 302 208, 865–868 MHz | TTL UART |
Specifications can change between production batches. Confirm the current revision with us before placing volume orders.
Ordering options
Quote the SKU that matches your frequency, interface and mounting. Not sure? Send us your controller model and we will pick the variant for you.
| SKU | Configuration | Actions |
|---|---|---|
| GM-130-1P-US | Single-port module, US FCC band (902–928 MHz), TTL UART | |
| GM-130-1P-EU | Single-port module, EU ETSI band (865–868 MHz), TTL UART |
Where the GM-130 is used
- Core engine for a long-range vehicle-lane reader built around your own panel antenna
- Tag inventory inside a self-service kiosk, library return box or tool dispenser
- Adding UHF encoding to a label printer or production-line station
- Retrofitting UHF reads to an existing controller board through a spare UART
UHF RFID for Warehouses, Dock Doors & Portals
Plan RFID for warehouse management: fixed readers and circular antennas at dock doors, conveyor tunnels, handheld cycle counts and on-metal asset tags.
RFID Asset & Tool Tracking
Build an RFID asset tracking system: on-metal, ceramic and tie-on tags matched to each asset, handheld audits, smart cabinets and IP67 HF heads for tooling.
GM-130 FAQ
Does the GM-130 need a heatsink?
Yes. The module is specified for air cooling through an external heatsink, so mount it on a metal plate or heatsink inside your enclosure, especially when running near 33 dBm.
Which host interface and baud rate does it use?
A TTL-level UART at 115200 bps by default, with 38400 bps as an alternative. The USB pins on the header are for factory testing only, so design your host link around the UART.
How should I size the power supply?
Provide 3.7–5 V DC capable of 1.2 A (±10%) at the module, and connect both supply pins and both ground pins on the header.
Which version do I order for the US or Europe?
GM-130-1P-US is set up for the FCC 902–928 MHz band and GM-130-1P-EU for ETSI 865–868 MHz. If the reader ships to another region, name the country and we check which region plan applies.
What read range can I expect?
The specified range is 5 cm to 20 m. Where you land in that span depends mainly on your antenna, the tag type and the output power you set.
Before you buy
Related buyer guides
UHF RFID Frequency by Country: 902–928 MHz vs 865–868 MHz and Other Bands
Compare UHF RFID reader bands by country, including US, EU, UK, China, India and Japan. Understand ERP, EIRP, channel conditions and radio approvals.
How to Wire a Long-Range UHF Reader to an Access Controller or Barrier
Wire a UHF reader's D0, D1 and ground to your controller, match 26/34-bit Wiegand, size 12 V power and trigger the barrier by relay. Diagrams included.
Does RFID Work on Metal? How to Choose On-Metal Tags
Yes, RFID works on metal with tags built for it. See why metal detunes standard tags, compare ABS, PCB, ceramic and label tags, and test read range properly.
Related products
GM-120
4-Port UHF RFID Reader Module, 33 dBm, UART/TTL
Four-antenna UHF reader engine on the Impinj R2000 for smart cabinets, shelf readers and portals: 0–33 dBm, 700+ tags/s, TTL UART, FCC and ETSI versions.
860–960 MHz (US or EU version)40–33 dBm
Details →
GM-110
8-Port UHF RFID Reader Module, 33 dBm, UART/TTL
Eight-antenna UHF reader engine on the Impinj R2000 for multi-shelf cabinets and tunnel readers: 0–33 dBm, 700+ tags/s, 1,000-tag buffer, TTL UART.
860–960 MHz (US or EU version)80–33 dBm
Details →
GM-150
US/EU Dual-Band UHF RFID Reader Module, 7–30 dBm, TTL
One UHF reader module for both 865–868 MHz and 902–928 MHz builds: 7–30 dBm output (±1 dB), sensitivity below −85 dBm, hardware watchdog and TTL UART.
865–868 MHz and 902–928 MHz7–30 dBm (±1 dB)< −85 dBm
Details →
GM-140
Ultra-Thin Low-Power UHF RFID Module, 18–26 dBm, TTL
50 × 50 mm integrated UHF RFID module for handhelds and desktop card issuers: 18–26 dBm, 100–250 mA, TTL UART, reads up to 3 m with no heatsink. US and EU versions.
902–928 MHz (US) / 865–868 MHz (EU)18–26 dBmUp to 3 m
Details →
GM-160
Mini 23 × 20 mm UHF RFID Reader Module, 902–928 MHz, TTL
Stamp-sized 23 × 20 mm UHF RFID reader module for US-band (902–928 MHz) devices: 18–26 dBm, sensitivity below −85 dBm, TTL UART and a hardware watchdog.
902–928 MHz (FCC)18–26 dBm< −85 dBm
Details →
LR-110
30 m Long-Range UHF RFID Reader for Parking, IP66
IP66 integrated UHF reader that identifies vehicle tags at up to 12 m (9 dBi) or 30 m (12 dBi), with Wiegand 26/34, RS485, USB and optional TCP/IP.
Up to 12 m (9 dBi) / up to 30 m (12 dBi)865–868 MHz (EU) or 902–928 MHz (US)Wiegand 26/34, RS485, USB; TCP/IP optional
Details →
LR-150
Standalone UHF RFID Access Controller, Bluetooth, IP66
IP66 all-in-one UHF reader and access controller: stores 5,000 users, controls the gate lock, opens by Bluetooth and reads tags at up to 10 m or 20 m.
5,0002–10 m (309 mm) / 10–20 m (445 mm)865–868 MHz (EU) or 902–928 MHz (US)
Details →
LR-140
20 m Long-Range UHF RFID Reader, 12 dBi, Wiegand & RS485
445 mm IP66 integrated UHF reader with a 12 dBi linear antenna that reads vehicle tags at 10–20 m and reports over Wiegand, RS485 or optional TCP/IP.
10–20 m865–868 MHz (EU) or 902–928 MHz (US)Wiegand, RS485; TCP/IP on -NET-BT
Details →
Get pricing for the GM-130
Send your card type, interface and quantity. You get a quote, lead time and compatibility notes within 24 hours — samples available for most items.