RT Open GPS Board
About the RT Open GPS Board
RT Open GPS Board is an open source ESP32 PCB design by rtymk, published on GitHub under the MIT license. It is a 4-layer board measuring 85 × 100 mm, with 111 components from 48 distinct parts.
Its main chip is the C7499337, from the ESP32 family. Other key parts include the TPS7A2033PDBVR, LC29HEAMD, MCP2518FDT-E_SL, SN74AXC1T45DBVR and E22-900M33S. By type, the board carries 47 capacitors, 36 resistors, 13 ICs, 5 connectors, 4 diodes and 3 inductors.
It belongs with the rf & radio designs in this gallery.
From the project
Open source RTK GPS board for agricultural applications. LC29HEA GNSS reciever, E22 -900m33s LoRa Radio, 1x RS232 Out, 1x RS232 In, 2x CAN Trasncievers
This repo is a work in progress and is currently being updated.
Open source RTK GPS board for agricultural applications. LC29HEA GNSS reciever, E22 -900m33s LoRa Radio, 1x RS232 Out, 1x RS232 In, 2x CAN Trasncievers.
All CAD files are available to manufacture boards on your own. Cost per board is around $125 to have manufactured by JLCPCB. Boards are capable of functioning as RTK base stations or mobile RTK recievers, depending on the firmware deployed.
Main components on the RT Open GPS Board
RT Open GPS Board bill of materials (BOM)
111 components, 48 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | TPS7A2033PDBVR Texas Instruments | SOT-23-5 | U1 |
| 1 | LC29HEAMD Quectel | LC29HEAMD | U2 |
| 1 | MCP2518FDT-E_SL Microchip Tech | MCP2518FDT-E_SL | U3 |
| 2 | SN74AXC1T45DBVR Texas Instruments | SN74AXC1T45DBVR | U4, U11 |
| 1 | E22-900M33S Chengdu Ebyte Elec Tech | E22-900M33S | U5 |
| 2 | MAX3232CDR Texas Instruments | MAX3232CDR | U6, U7 |
| 1 | TPS54302DDCR_C311983 Texas Instruments | TPS54302DDCR_C311983 | U8 |
| 1 | ICM-42688-P_TOKMAS Tokmas | ICM-42688-P_TOKMAS | U10 |
| 2 | MCP2562FD-E_SN Microchip Tech | MCP2562FD-E_SN | U12, U13 |
| 1 | C7499337 ESP32-S3-DevKitC | ESP32-S3-DevKitC | U14 |
| 1 | C20526 MMBT3904 100-300 Changjiang Electronics Tech (CJ) | Q_SOT-23 | Q1 |
| 1 | X1E0000210624 Seiko Epson | X1E0000210624 | X1 |
| 1 | C75750 MALE DC9 CONNFLY Elec | DS1037-09MNAKT74-0CC | J1 |
| 1 | C75749 FEMALE DC9 CONNFLY Elec | DS1037-09FNAKT74-0CC | J2 |
| 1 | WJ128V-5_0-2P Ningbo Kangnex Elec | WJ128V-5_0-2P | P1 |
| 2 | WJ126V-5_0-6P Ningbo Kangnex Elec | WJ126V-5_0-6P | P2, P3 |
| 1 | KH-SMA-K513-G Shenzhen Kinghelm Elec | KH-SMA-K513-G | RF1 |
| 4 | SS34 MDD（Microdiode Electronics） | D_SMA | D3, D4, D5, D6 |
| 1 | BLM31PG601SN1L Murata Electronics | L_1206_3216Metric | FB1 |
| 1 | LQW15AN68NJ00D Murata Electronics | LQW15AN68NJ00D | L1 |
Show 28 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 10UH 10uH | L_Bourns_SRN6045TA | L2 |
| 2 | 18PF 18pF FH(Guangdong Fenghua Advanced Tech) | C_0402 | C1, C2 |
| 2 | 10UF 10uF Samsung Electro-Mechanics | C_0402 | C3, C15 |
| 27 | 100NF 100nF Samsung Electro-Mechanics | C_0402 | C4, C7, C11, C16, C18, C19, C20, C21 +19 |
| 2 | 33PF 33pF FH(Guangdong Fenghua Advanced Tech) | C_0402 | C5, C6 |
| 1 | 4.7UF 4.7uF Samsung Electro-Mechanics | C_0402 | C8 |
| 2 | 1UF 1uF Samsung Electro-Mechanics | C_0402 | C9, C10 |
| 2 | 100PF 100pF FH(Guangdong Fenghua Advanced Tech) | C_0402 | C12, C13 |
| 2 | 470 uF Nichicon | CP_Elec_10x10 | C14, C44 |
| 1 | 100UF 100uF Samsung Electro-Mechanics | C_1206 | C17 |
| 1 | 2.2UF 2.2uF Samsung Electro-Mechanics | C_0402 | C35 |
| 1 | 10NF 10nF Samsung Electro-Mechanics | C_0402 | C37 |
| 1 | 10UF 10uF Samsung Electro-Mechanics | C_0603 | C38 |
| 2 | 22UF 22uF Samsung Electro-Mechanics | C_0805 | C41, C42 |
| 1 | 75PF 75pF YAGEO | C_0402 | C43 |
| 1 | 2.2kΩ UNI-ROYAL(Uniroyal Elec) | R_0402 | R1 |
| 1 | 510kΩ UNI-ROYAL(Uniroyal Elec) | R_0603 | R2 |
| 7 | 10kΩ UNI-ROYAL(Uniroyal Elec) | R_0402 | R3, R4, R5, R9, R18, R21, R22 |
| 1 | 4.7kΩ UNI-ROYAL(Uniroyal Elec) | R_0402 | R6 |
| 1 | 100Ω UNI-ROYAL(Uniroyal Elec) | R_0402 | R7 |
| 8 | 0Ω UNI-ROYAL(Uniroyal Elec) | R_1206 | R8, R11, R12, R13, R14, R15, R19, R20 |
| 1 | 10Ω UNI-ROYAL(Uniroyal Elec) | R_0402 | R10 |
| 2 | 120Ω UNI-ROYAL(Uniroyal Elec) | R_0402 | R16, R36 |
| 3 | 100kΩ UNI-ROYAL(Uniroyal Elec) | R_0402 | R17, R23, R25 |
| 1 | 49.9Ω UNI-ROYAL(Uniroyal Elec) | R_0402 | R24 |
| 1 | 13.3K 13.3k UNI-ROYAL(Uniroyal Elec) | R_0402 | R26 |
| 8 | 0Ω UNI-ROYAL(Uniroyal Elec) | R_0805 | R27, R28, R29, R30, R31, R32, R33, R34 |
| 1 | 47kΩ UNI-ROYAL(Uniroyal Elec) | R_0402 | R35 |
RT Open GPS Board design files
The KiCad project lives in the rtymk/RT_Open_GPS_Board repository on GitHub; these links point at the commit this page was built from.
RT Open GPS Board: common questions
What microcontroller does the RT Open GPS Board use?
The RT Open GPS Board is built around the C7499337, from the ESP32 family.
How big is the RT Open GPS Board?
The RT Open GPS Board measures 85 × 100 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the RT Open GPS Board?
111 components, from 48 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the RT Open GPS Board design files?
From the rtymk/RT_Open_GPS_Board repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the RT Open GPS Board design in my own project?
Yes, under the terms of its MIT license, which rtymk chose for the repository.
Can I test firmware for the RT Open GPS Board without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP32 firmware against it before you order a PCB.
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