8 layers35 × 35 mm
OpenAIO
tetraethylmethane/NIDAR-RescueSwarm
Three autonomous drones that search a flood zone, find survivors, geotag them, and drop medical kits — with no network, no pilot, and one operator who only presses start.
285 parts1
6 layers64.2 × 17.3 mm
OpenRX panel rev2.2
OpenDrone-hw/OpenRX489OpenRX open-source ExpressLRS receiver family hub; board sources live in four dedicated hardware repositories.
- Size
- 64.2 × 17.3 mm
- Copper layers
- 6
- Thickness
- 1 mm
- Parts
- 254
- Nets
- 248
- Pads
- 1,356
- Tracks, vias
- 1,564, 538
- Pours
- 105
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 23 Mar 2026
- Updated
- 24 Oct 2026
Overview
OpenRX panel rev2.2 is an open-source printed circuit board by OpenDrone-hw, from the OpenDrone-hw/OpenRX repository on GitHub, published under the CERN-OHL-S-2.0 licence. It is a 6-layer board of 64.2 × 17.3 mm with 254 parts on 248 nets, routed with 1,564 tracks and 538 vias.
It is built around the ESP32-C3FH4, LR1121IMLTRT and RFX2401C, with the SKY13373-460LF, SX1281IMLTRT and 2450FM07D0034001T among its other parts. Its parts include 124 capacitors, 28 resistors, 20 ICs, 20 inductors and 4 diodes. It belongs with the ESP32 and RISC-V boards of this library.
Main components
12
ESP32-C3FH4
QFN-32-EP(5x5)160MHz 32 Bit 3V~3.6V 400KB RISC-V Watchdog reset、Software reset、Built-in general-purpose timer、Programmable watchdog、Built-in temperature sensor、True random number generator (TRNG)、Storage encryption、Infrared remote control QFN-32-EP(5x5) Microcontrollers (MCU/MPU/SOC) ROHSEspressif SystemsMicrocontrollers (MCU/MPU/SOC)
LR1121IMLTRT
QFN-32-EP(5x5)-108dBm -40℃~+85℃ 1.8V~3.7V 101.5Kbps 13dBm 150MHz~960MHz、1.9GHz~2.1GHz、2.4GHz~2.5GHz 26mA 7.8mA LoRa Power-on reset function、Power-off reset function SPI transceiver QFN-32-EP(5x5) RF Transceiver ICs ROHSSEMTECHRF Transceiver ICs
RFX2401C
QFN-16-EP(3x3)-10dB -12dB -15dB -40℃~+85℃ -8dB -8dBm 2.4GHz~2.5GHz 22dBm 2V~3.6V ZigBee 集成低噪声放大器、集成射频开关、集成功率放大器、集成射频滤波器、集成功率检测器 QFN-16-EP(3x3) RF Front End Circuits ROHSSkyworks SolutionsRF Front End Circuits
SKY13373-460LF
QFN-12-EP(2x2)-40℃~+85℃ 0.45dB 100MHz~6GHz 2.5V~4.8V 30dB 39dBm Integrated control logic triple-pole/single-throw QFN-12-EP(2x2) RF Switches ROHSSkyworks SolutionsRF Switches
SX1281IMLTRT
QFN-24-EP(4x4)-132dBm -40℃~+85℃ 1.8V~3.7V 12.5dBm 2.4GHz 2.4GHz~2.5GHz 24mA 2Mbps 8.2mA LoRa SPI、UART Supports RSSI function transceiver QFN-24-EP(4x4) RF Transceiver ICs ROHSSEMTECHRF Transceiver ICs
2450FM07D0034001T
SMD-4P,1x0.5mm-40℃~+85℃ 0.75dB 50Ω SMD-4P,1x0.5mm RF Filters ROHSJohanson DielectricsRF Filters
LQP03TN2N0B02D
020112.5GHz 14@500MHz 150mΩ 2nH 600mA Thick Film Inductor 0201 Inductors (SMD) ROHSMurataInductors (SMD)LQP03TN2N5C02D
020110GHz 14@500MHz 2.5nH 200mΩ 500mA Thick Film Inductor 0201 Inductors (SMD) ROHSMurataInductors (SMD)
2450AT18A0100001E
12060.5dBi 1.3mm 1.6mm 100MHz 2.4GHz 2W 3.2mm 50Ω Patch Antenna 1206 Antennas ROHSJohanson DielectricsAntennasLQP03TN24NH02D
020112@500MHz 140mA 2.3Ω 24nH 2GHz Thick Film Inductor ±3% 0201 Inductors (SMD) ROHSMurataInductors (SMD)
CJ17-400001010B20
SMD1612-4P10pF 40MHz Crystal Oscillator ±10ppm ±20ppm SMD1612-4P Crystals ROHSJiangsu Changjing Electronics Technology (CJ)Crystals
XL-1010RGBC-2812B
SMD,1x1mm-20℃~+85℃ 0.35mA 0.8mm 120° 1kHz 1mm 1mm 2000V 200mcd、800mcd、300mcd 4.5V~5.5V 800Kbit/s B:465nm~475nm、R:620nm~625nm、G:520nm~530nm G:525nm、R:625nm、B:470nm Top-mount Water Clear SMD,1x1mm RGB LEDs(Built-in IC) ROHSXINGLIGHTRGB LEDs(Built-In IC)
README
README.mdOpenRX
OpenRX is the home of the OpenDrone open-source ExpressLRS receiver family. The four boards now follow the same one-board-per-repository standard as the rest of the OpenDrone hardware line. This repository remains open as the family hub, preserving its stars, issues, releases, tags, and complete history.
Board repositories
| Board | Radio and antenna | Source and releases |
|---|---|---|
| OpenRX Lite | SX1281, 2.4 GHz, on-board ceramic | OpenDrone-hw/OpenRX-Lite |
| OpenRX Lite-UFL | SX1281, 2.4 GHz, U.FL | OpenDrone-hw/OpenRX-Lite-UFL |
| OpenRX Mono | LR1121, dual band, one U.FL | OpenDrone-hw/OpenRX-Mono |
| OpenRX Gemini | Two LR1121 radios, dual band, two U.FL | OpenDrone-hw/OpenRX-Gemini |
KiCad sources, firmware target definitions, board documentation, and future
releases live in those repositories. The family-level Rev 2 and Rev 2.1 tags
and releases remain here as the immutable record of the original combined
repository; their per-board assets are also available from each board repo.
The Rev 2.2 tag marks the source of the production panel in panel/, the four
boards merged on one strip. Fab-ready manufacturing files are kept in a private
Incutec production repository and are not published.
Specifications
| Lite | Lite-UFL | Mono | Gemini | |
|---|---|---|---|---|
| Band | 2.4 GHz | 2.4 GHz | Dual band | Dual band, Xrossband |
| Radio | SX1281 | SX1281 | LR1121 | 2x LR1121 |
| Antenna | On-board ceramic | U.FL | U.FL | 2x U.FL |
| Telemetry power | 13 dBm (20 mW) | 13 dBm (20 mW) | Up to 22 dBm (158 mW) | Up to 22 dBm (158 mW) |
| Protocol | CRSF | CRSF | CRSF | CRSF |
| MCU | ESP32-C3 | ESP32-C3 | ESP32-C3 | ESP32-C3 |
| Input | 5 V pad | 5 V pad | 5 V pad | 5 V pad |
| Firmware | ExpressLRS | ExpressLRS | ExpressLRS | ExpressLRS |
| Flashing | Betaflight passthrough or Wi-Fi | Betaflight passthrough or Wi-Fi | Betaflight passthrough or Wi-Fi | Betaflight passthrough or Wi-Fi |
| Dimensions | 10.0 x 11.5 mm | 10.0 x 11.5 mm | 10.0 x 17.3 mm | 17.0 x 15.7 mm |
| PCB | 6-layer, 1.0 mm | 6-layer, 1.0 mm | 6-layer, 1.0 mm | 6-layer, 1.0 mm |
OSHWA certification is issued per board: Lite BE000030, Lite-UFL BE000031, Mono BE000032, and Gemini BE000033.
In the line
What pairs with what, and what is available: opendrone.be.
Contributing
Choose the board repository above for hardware changes. Family-wide questions and historical discussion remain welcome here. See CONTRIBUTING.md.
License
Hardware licensed under CERN-OHL-S-2.0, see LICENSE.
Parts
254| Qty | Value | Footprint | References |
|---|---|---|---|
| 30 | 100nF | Capacitor_SMD:C_0201_0603Metric | C12, C13, C14, C16, C105, C106, C109, C112, C113, C114, C116, C205, C206, C209, C212, C213 +14 |
| 27 | 1uF | Capacitor_SMD:C_0201_0603Metric | C10, C17, C25, C104, C110, C117, C125, C127, C128, C131, C204, C210, C215, C223, C225, C228 +11 |
| 16 | 10k | Resistor_SMD:R_0201_0603Metric | R2, R3, R4, R5, R102, R103, R104, R105, R202, R203, R204, R205, R302, R303, R304, R305 |
| 12 | 10uF | Capacitor_SMD:C_0402_1005Metric | C8, C11, C18, C108, C111, C118, C208, C211, C216, C308, C311, C316 |
| 9 | 47p | Capacitor_SMD:C_0201_0603Metric | C2, C23, C24, C39, C42, C44, C102, C123, C124 |
| 8 | 1.2pF | Capacitor_SMD:C_0201_0603Metric | C29, C30, C129, C130, C221, C222, C321, C322 |
| 8 | 10nF | Capacitor_SMD:C_0201_0603Metric | C26, C126, C224, C226, C227, C324, C326, C327 |
| 8 | 15pF | Capacitor_SMD:C_0201_0603Metric | C1, C3, C101, C103, C201, C203, C301, C303 |
| 6 | 100k | Resistor_SMD:R_0201_0603Metric | R7, R8, R11, R12, R107, R108 |
| 5 | 2450FM07D0034T | OpenRX-Shared:FILTER-SMD_4P-L1.0-W0.5-L | FL1, FL2, FL101, FL201, FL301 |
| 5 | 470nF | Capacitor_SMD:C_0201_0603Metric | C20, C38, C120, C220, C320 |
| 4 | 2.0nH | Inductor_SMD:L_0201_0603Metric | L3, L103, L203, L303 |
| 4 | 2.5nH | Inductor_SMD:L_0201_0603Metric | L4, L104, L202, L302 |
| 4 | 2450AT18A100E | OpenRX-Shared:ANT-SMD_L3.2-W1.6 | AE1, AE101, AE201, AE301 |
| 4 | 24nH | Inductor_SMD:L_0201_0603Metric | L2, L102, L201, L301 |
| 4 | 5V | OpenRX-Shared:SolderPad_1.2x2.0mm | TP3, TP103, TP203, TP303 |
| 4 | CJ17-400001010B20 | OpenRX-Shared:CRYSTAL-SMD_4P-L1.6-W1.2-BL | X1, X101, X201, X301 |
| 4 | ESP32-C3 | Package_DFN_QFN:QFN-32-1EP_5x5mm_P0.5mm_EP3.7x3.7mm | U1, U101, U201, U301 |
| 4 | GND | OpenRX-Shared:SolderPad_1.2x2.0mm | TP4, TP104, TP204, TP304 |
| 4 | RX | OpenRX-Shared:SolderPad_1.2x2.0mm | TP1, TP101, TP201, TP301 |
| 4 | TLV75533PDQNR | OpenRX-Shared:X2SON-4_L1.0-W1.0-P0.65-TL-EP | U2, U102, U202, U302 |
| 4 | TX | OpenRX-Shared:SolderPad_1.2x2.0mm | TP2, TP102, TP202, TP302 |
| 4 | XL-1010RGBC-WS2812B | OpenRX-Shared:LED-SMD_4P-L1.0-W1.0-TL_XL-1010RGBC-WS2812B | D1, D101, D201, D301 |
| 3 | 0900PC16J0042001E | OpenRX-Shared:FILTER-SMD_10P-L2.0-W1.6-BL | T1, T2, T101 |
| 3 | 10pF | Capacitor_SMD:C_0201_0603Metric | C7, C34, C107 |
| 3 | 10uH | Inductor_SMD:L_0603_1608Metric | L1, L6, L101 |
| 3 | 1n | Capacitor_SMD:C_0201_0603Metric | C22, C43, C122 |
| 3 | 2.2nF | Capacitor_SMD:C_0201_0603Metric | C19, C33, C119 |
| 3 | 200 | Resistor_SMD:R_0201_0603Metric | R1, R10, R101 |
| 3 | 220 | Resistor_SMD:R_0201_0603Metric | R6, R9, R106 |
| 3 | 220pF | Capacitor_SMD:C_0201_0603Metric | C21, C40, C121 |
| 3 | 47nH | Inductor_SMD:L_0402_1005Metric | L5, L7, L105 |
| 3 | 47pF | Capacitor_SMD:C_0201_0603Metric | C15, C36, C115 |
| 3 | BOOT | OpenRX-Shared:SolderPad_1.2x2.0mm | TP105, TP205, TP305 |
| 3 | Conn_Coaxial_Small | Connector_Coaxial:U.FL_Hirose_U.FL-R-SMT-1_Vertical | J1, J2, J101 |
| 3 | LR1121IMLTRT | Package_DFN_QFN:QFN-32-1EP_5x5mm_P0.5mm_EP3.7x3.7mm | U3, U6, U103 |
| 3 | RFX2401C | OpenRX-Shared:QFN-16_L3.0-W3.0-P0.50-BL-EP1.7 | U4, U7, U104 |
| 3 | SKY13373-460LF | OpenRX-Shared:QFN-12_EP_2x2_Pitch0.5mm | U5, U8, U105 |
| 2 | 15uH | Inductor_SMD:L_0805_2012Metric | L204, L304 |
| 2 | 1nF | Capacitor_SMD:C_0201_0603Metric | C219, C319 |
| 2 | OW7EL89CENUNFAYLC-52M | OpenRX-Shared:OSC-SMD_4P-L2.0-W1.6-BL_TXC_7Z | OSC201, OSC301 |
| 2 | OW7EL89CENUYO3YLC-32M | OpenRX-Shared:OSC-SMD_4P-L2.0-W1.6-BL_TXC_7Z | OSC1, OSC101 |
| 2 | SX1281IMLTRT | OpenRX-Shared:QFN-24_L4.0-W4.0-P0.50-TL-EP2.6 | U203, U303 |
| 1 | 47948-0001 | OpenRX-Shared:ANT-SMD_47948-0001 | AE302 |
| 1 | Conn_Coaxial | Connector_Coaxial:U.FL_Hirose_U.FL-R-SMT-1_Vertical | J201 |
| 1 | LOGO | OpenRX-Shared:expresslrs_logo | G*** |
| 1 | TS2306A 240GF MSM 9_C2976675 | OpenRX-Shared:SW-SMD_4P-L3.0-W2.0-P0.85-LS3.5 | U9 |
| 1 | TestPoint | TestPoint:TestPoint_Pad_D1.5mm | TP5 |
The 242 most common of 254 parts.
Questions
How big is the OpenRX panel rev2.2 PCB?
It measures 64.2 × 17.3 mm and has 6 copper layers, 1 mm thick.
What parts does the OpenRX panel rev2.2 use?
254 parts, built around the ESP32-C3FH4, LR1121IMLTRT, RFX2401C and SKY13373-460LF. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the OpenRX panel rev2.2 KiCad files?
From the OpenDrone-hw/OpenRX repository on GitHub, at the commit this page was made from: the board is panel/OpenRX-panel-rev2.2.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the OpenRX panel rev2.2 design in my own project?
Its repository publishes it under the CERN-OHL-S-2.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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