Meshtastic Radio Design Inquiry
0:00
Diagram
selected and added core schematic blocks
2:01
Searching for components.
Searching library for: "LoRa transceiver module based on SX1262 or SX1276 for 915 MHz / 868 MHz, SPI interface, with RF pin and optional u.FL, suitable for Meshtastic"
Searching library for: "USB-C receptacle connector for USB2.0 device, 16-pin mid-mount or through-hole, with shield pins, common footprint"
Searching library for: "3.3V regulator for ESP32 + LoRa, from Li-ion 3.0-4.2V input, low quiescent current, at least 500mA peak, SOT-23-5 or DFN, good availability"
Searching library for: "u.FL (I-PEX MHF) RF connector footprint part for 50 ohm antenna connection on 915/868 MHz"
Searching library for: "USB-UART bridge IC for ESP32 programming, e.g. CP2102N or CH340C, QFN/QFP, plus ESD, for portable device"
Creating search plan for: "LoRa transceiver module based on SX1262 or SX1276 for 915 MHz / 868 MHz, SPI interface, with RF pin and optional u.FL, suitable for Meshtastic --- Suggested search options: fieldCategories: ["core","type","packaging","manufacturer","availability","specifications"] hitsPerPage: 5"
Creating search plan for: "Li-ion single-cell charger with power-path (load sharing) for USB 5V input, 1A class, simple passives, for portable device --- Suggested search options: fieldCategories: ["core","type","packaging","manufacturer","availability","specifications"] hitsPerPage: 5"
Creating search plan for: "ESD TVS diode array for USB2.0 D+ D- and possibly CC lines, low capacitance, suitable for USB-C --- Suggested search options: fieldCategories: ["core","type","packaging","manufacturer","availability","specifications"] hitsPerPage: 5"
Creating search plan for: "JST-PH 2-pin battery connector footprint part for LiPo 1S battery --- Suggested search options: fieldCategories: ["core","type","packaging","manufacturer","availability","specifications"] hitsPerPage: 5"
Started: selecting core parts for ESP32 LoRa power
Searching: "SMD u.FL (I-PEX MHF) 50-ohm RF coax connector for PCB antenna on 915/868 MHz — right-angle and top-mount footprints, low-loss, 50 ohm characteristic impedance"
Found 45 results.
Searching: "USB-UART bridge IC for programming ESP32, small SMD QFN or QFP package, integrated ESD protection preferred, USB Full-Speed, suitable for portable device"
Searching: "ESP32-S3 castellated Wi-Fi + BLE module with USB device support, low-power for battery-powered handhelds; prefer WROOM-style SMD/castellated modules"
Searching: "USB-C receptacle connector for USB2.0 device, 16-pin mid-mount or through-hole, with shield pins, common footprint --- Suggested search options: fieldCategories: ["core","type","packaging","manufacturer","availability","specifications"] hitsPerPage: 5"
Searching: "JST-PH 2-pin battery connector footprint part for LiPo 1S battery --- Suggested search options: fieldCategories: ["core","type","packaging","manufacturer","availability","specifications"] hitsPerPage: 5"
Found 66 results.
Found 52 results.
Found 23 results.
Searching: "Single-cell Li-ion battery charger with integrated power-path/load-sharing for USB 5V input, up to 1 A charge current, minimal external passives; prefer SOT-23 or small QFN SMD packages"
Searching: "LoRa transceiver module based on SX1262 or SX1276 for 915 MHz / 868 MHz, SPI interface, with RF pin and optional u.FL, suitable for Meshtastic --- Suggested search options: fieldCategories: ["core","type","packaging","manufacturer","availability","specifications"] hitsPerPage: 5"
Searching: "Li-ion single-cell charger with power-path (load sharing) for USB 5V input, 1A class, simple passives, for portable device --- Suggested search options: fieldCategories: ["core","type","packaging","manufacturer","availability","specifications"] hitsPerPage: 5"
Searching: "3.3V buck-boost regulator from 3.0-4.2V input, low quiescent current, >=500mA peak, SOT-23-5 or DFN preferred, for powering ESP32 + LoRa"
Searching: "3.3V regulator for ESP32 + LoRa, from Li-ion 3.0-4.2V input, low quiescent current, at least 500mA peak, SOT-23-5 or DFN, good availability --- Suggested search options: fieldCategories: ["core","type","packaging","manufacturer","availability","specifications"] hitsPerPage: 5"
Finished searching for components.
Analyzing the schematic.
Added 30 components
0:09
Added 1x ESP32-S3-WROOM-1-N16R8 as IC1
Added 1x Wio-SX1262 Wireless Module as IC2
Added 1x USB-C 2.0 Receptacle as J1
Added 1x BQ24075TRGTR as IC3
Added 1x TPS63031DSKR as U1
Added 1x USBLC6-2P6 as U2
Added 1x B2B-PH-K-S(LF)(SN) as J2
Added 1x U.FL-R-SMT-1(10) as J3
Added 1x CP2102N-A02-GQFN20 as U3
Added 7x Generic Resistor as R1, R2, R3, R4, R5, R6, R7
Added 13x Generic Capacitor as C1, C2, C3, C4, C5, C6, C7, C8, C9, C10, C11, C12, C13
Added 1x Generic Inductor as L1
wiring USB-C, charger, regulator, MCU, LoRa...
2:54
Started: wiring USB-C, charger, regulator, MCU, LoRa
Analyzing the schematic.
Running design review.
Analyzing the schematic...
No changes applied.
0:01
Updated 32 connections
0:14
Connected J1:GND, U2:GND, U3:GND, U3:GND, IC3:VSS, IC3:EP, U1:GND, U1:PGND, U1:EP, IC1:GND_1, IC1:GND_2, IC1:GND_3, IC1:GND_4, IC1:GND_5, IC1:GND_6, IC1:GND_7, IC1:GND_8, IC1:GND_9, IC1:GND_10, IC1:GND_11, IC2:GND_1, IC2:GND_2, J3:Outer_Contact, J3:Outer_Contact, J2:PIN2, C1:P2, C2:P2, C3:P2, C4:P2, C5:P2, C6:P2, C7:P2, C8:P2, C9:P2, C10:P2, C11:P2, C12:P2, C13:P2, R1:P2, R2:P2, R3:P2, R4:P2 to ^GND
Connected J1:VBUS, J1:VBUS, J1:VBUS, J1:VBUS, IC3:IN, U2:VBUS, C9:P1, U3:VREGIN, U3:USB to ^VBUS_5V
Connected J1:CC1, R1:P1 to ^USB_CC1
Connected J1:CC2, R2:P1 to ^USB_CC2
Connected J1:D+, J1:D+, U2:I/O1, U3:D+ to ^USB_DP
Connected J1:D-, J1:D-, U2:I/O2, U2:I/O2, U3:D- to ^USB_DM
Connected U1:VOUT, U1:FB, IC1:3V3, IC2:VCC, U3:VDD, C1:P1, C2:P1, C3:P1, C4:P1, C5:P1, C6:P1, C7:P1, C8:P1, C12:P1 to ^3V3
Connected IC3:OUT_1, IC3:OUT_2, U1:VIN, U1:VINA, C10:P1 to ^SYS
Connected IC3:BAT_1, IC3:BAT_2, J2:PIN1, C11:P1 to ^VBAT
Connected U1:L1, L1:P1 to ^SW_L1
Connected U1:L2, L1:P2 to ^SW_L2
Connected U1:EN, U1:PS/SYNC, U1:VIN to ^REG_CTRL
Connected IC1:EN, R3:P1, IC1:3V3 to ^ESP_EN
Connected IC2:NRST, R7:P1, IC2:VCC to ^LORA_NRST
Connected IC1:IO12, IC2:NSS to ^LORA_NSS
Connected IC1:IO11, IC2:SCK to ^LORA_SCK
Connected IC1:IO10, IC2:MOSI to ^LORA_MOSI
Connected IC1:IO9, IC2:MISO to ^LORA_MISO
Connected IC1:IO13, IC2:DIO1 to ^LORA_DIO1
Connected IC1:IO14, IC2:BUSY to ^LORA_BUSY
Connected IC2:ANT, C13:P1 to ^LORA_RF
Connected C13:P2, J3:Center_Contact to ^ANT_EXT
Connected U3:TXD, IC1:RXD0 to ^UART_TX_TO_ESP_RX
Connected U3:RXD, IC1:TXD0 to ^UART_RX_FROM_ESP_TX
Connected IC3:~CE, IC3:IN to ^CHG_CE
Connected IC3:EN1, IC3:IN to ^CHG_EN1
Connected IC3:EN2, IC3:IN to ^CHG_EN2
Connected IC3:SYSOFF, IC3:VSS to ^CHG_SYSOFF
Connected IC3:TS, IC3:VSS to ^CHG_TS
Connected IC3:TMR, IC3:VSS to ^CHG_TMR
Connected IC3:ISET, IC3:VSS to ^CHG_ISET
Connected IC3:ILIM, IC3:VSS to ^CHG_ILIM
nets {
net GND = J1:GND, IC3:ILIM, IC3:ISET, IC3:TMR, IC3:TS, IC3:SYSOFF, IC1:GND_2, IC1:GND_3, IC1:GND_4, IC1:GND_5, IC1:GND_6, IC1:GND_7, IC1:GND_8, IC1:GND_9, IC1:GND_10, IC1:GND_11, J3:Center_Contact, R4:P2, R3:P2, R2:P2, R1:P2, C13:P2, C12:P2, C11:P2, C10:P2, C9:P2, C8:P2, C7:P2, C6:P2, C5:P2, C4:P2, C3:P2, C2:P2, C1:P2, J2:PIN2, J3:Outer_Contact, IC2:GND_2, IC2:GND_1, IC1:GND_1, U1:EP, U1:PGND, U1:GND, IC3:EP, IC3:VSS, U3:GND, U2:GND;
net VBUS_5V = J1:VBUS, IC3:EN2, IC3:EN1, IC3:~CE, U3:USB, U3:VREGIN, C9:P1, U2:VBUS, IC3:IN;
net USB_CC1 = J1:CC1, R1:P1;
net USB_CC2 = J1:CC2, R2:P1;
net USB_DP = J1:D+, U3:D+, U2:I/O1;
net USB_DM = J1:D-, U3:D-, U2:I/O2;
net 3V3 = U1:VOUT, R7:P1, IC2:NRST, R3:P1, IC1:EN, C12:P1, C8:P1, C7:P1, C6:P1, C5:P1, C4:P1, C3:P1, C2:P1, C1:P1, U3:VDD, IC2:VCC, IC1:3V3, U1:FB;
net SYS = IC3:OUT_2, IC3:OUT_1, U1:VIN, U1:PS/SYNC, U1:EN, U1:VINA, C10:P1;
net VBAT = IC3:BAT_2, IC3:BAT_1, C11:P1, J2:PIN1;
net SW_L1 = U1:L1, L1:P1;
net SW_L2 = U1:L2, L1:P2;
net LORA_NSS = IC1:IO12, IC2:NSS;
net LORA_SCK = IC1:IO11, IC2:SCK;
net LORA_MOSI = IC1:IO10, IC2:MOSI;
net LORA_MISO = IC1:IO9, IC2:MISO;
net LORA_DIO1 = IC1:IO13, IC2:DIO1;
net LORA_BUSY = IC1:IO14, IC2:BUSY;
net LORA_RF = IC2:ANT, C13:P1;
net UART_TX_TO_ESP_RX = U3:TXD, IC1:RXD0;
net UART_RX_FROM_ESP_TX = U3:RXD, IC1:TXD0;
}
Updated project description
0:09
Updated to: "USB-C and Li-ion powered Meshtastic LoRa radio (ESP32-S3 + SX1262)"
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Properties
Diagram
Pricing & Availability
Distributor | Qty 1 |
|---|---|
Arrow | $4.08–$7.02 |
Digi-Key | $14.10–$16.03 |
LCSC | $12.75–$12.89 |
Mouser | $23.79 |
TME | $1.59 |
Verical | $5.69–$15.28 |
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