Meshtastic Radio Design Inquiry

0:00

Here is the system architecture I saved into the project property System Architecture:

Diagram

53 days

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.

53 days

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

53 days

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...

53 days

No changes applied.

0:01

53 days

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;

}

53 days

Updated project description

0:09

Updated to: "USB-C and Li-ion powered Meshtastic LoRa radio (ESP32-S3 + SX1262)"

53 days

Plan completed.

Show Plan

Reviews

Ground
A common return path for electric current. Commonly known as ground.
jharwinbarrozo
20.5M
Net Portal
Wirelessly connects nets on schematic. Used to organize schematics and separate functional blocks. To wirelessly connect net portals, give them same designator. #portal
jharwinbarrozo
43.0M
Power Net Portal
Wirelessly connects power nets on schematic. Identical to the net portal, but with a power symbol. Used to organize schematics and separate functional blocks. To wirelessly connect power net portals, give them the same designator. #portal #power
jharwinbarrozo
11.4M
Generic Resistor
A generic fixed resistor ideal for rapid circuit topology development. Its footprint automatically adapts based on the selected package case code—supporting 0402, 0603, 0805, 1203, and many other standard SMD packages, as well as axial horizontal and vertical configurations. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard resistor values: 1.0 ohm, 10 ohm, 100 ohm, 1.0k ohm, 10k ohm, 100k ohm, 1.0M ohm 1.1 ohm, 11 ohm, 110 ohm, 1.1k ohm, 11k ohm, 110k ohm, 1.1M ohm 1.2 ohm, 12 ohm, 120 ohm, 1.2k ohm, 12k ohm, 120k ohm, 1.2M ohm 1.3 ohm, 13 ohm, 130 ohm, 1.3k ohm, 13k ohm, 130k ohm, 1.3M ohm 1.5 ohm, 15 ohm, 150 ohm, 1.5k ohm, 15k ohm, 150k ohm, 1.5M ohm 1.6 ohm, 16 ohm, 160 ohm, 1.6k ohm, 16k ohm, 160k ohm, 1.6M ohm 1.8 ohm, 18 ohm, 180 ohm, 1.8K ohm, 18k ohm, 180k ohm, 1.8M ohm 2.0 ohm, 20 ohm, 200 ohm, 2.0k ohm, 20k ohm, 200k ohm, 2.0M ohm 2.2 ohm, 22 ohm, 220 ohm, 2.2k ohm, 22k ohm, 220k ohm, 2.2M ohm 2.4 ohm, 24 ohm, 240 ohm, 2.4k ohm, 24k ohm, 240k ohm, 2.4M ohm 2.7 ohm, 27 ohm, 270 ohm, 2.7k ohm, 27k ohm, 270k ohm, 2.7M ohm 3.0 ohm, 30 ohm, 300 ohm, 3.0K ohm, 30K ohm, 300K ohm, 3.0M ohm 3.3 ohm, 33 ohm, 330 ohm, 3.3k ohm, 33k ohm, 330k ohm, 3.3M ohm 3.6 ohm, 36 ohm, 360 ohm, 3.6k ohm, 36k ohm, 360k ohm, 3.6M ohm 3.9 ohm, 39 ohm, 390 ohm, 3.9k ohm, 39k ohm, 390k ohm, 3.9M ohm 4.3 ohm, 43 ohm, 430 ohm, 4.3k ohm, 43K ohm, 430K ohm, 4.3M ohm 4.7 ohm, 47 ohm, 470 ohm, 4.7k ohm, 47k ohm, 470k ohm, 4.7M ohm 5.1 ohm, 51 ohm, 510 ohm, 5.1k ohm, 51k ohm, 510k ohm, 5.1M ohm 5.6 ohm, 56 ohm, 560 ohm, 5.6k ohm, 56k ohm, 560k ohm, 5.6M ohm 6.2 ohm, 62 ohm, 620 ohm, 6.2k ohm, 62K ohm, 620K ohm, 6.2M ohm 6.8 ohm, 68 ohm, 680 ohm, 6.8k ohm, 68k ohm, 680k ohm, 6.8M ohm 7.5 ohm, 75 ohm, 750 ohm, 7.5k ohm, 75k ohm, 750k ohm, 7.5M ohm 8.2 ohm, 82 ohm, 820 ohm, 8.2k ohm, 82k ohm, 820k ohm, 8.2M ohm 9.1 ohm, 91 ohm, 910 ohm, 9.1k ohm, 91k ohm, 910k ohm, 9.1M ohm #generics #CommonPartsLibrary
jharwinbarrozo
1.5M
Generic Capacitor
A generic fixed capacitor ideal for rapid circuit topology development. You can choose between polarized and non-polarized types, its symbol and the footprint will automatically adapt based on your selection. Supported options include standard SMD sizes for ceramic capacitors (e.g., 0402, 0603, 0805), SMD sizes for aluminum electrolytic capacitors, and through-hole footprints for polarized capacitors. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard capacitor values: 1.0pF, 10pF, 100pF, 1000pF, 0.01uF, 0.1uF, 1.0uF, 10uF, 100uF, 1000uF, 10000uF 1.1pF, 11pF, 110pF, 1100pF 1.2pF, 12pF, 120pF, 1200pF 1.3pF, 13pF, 130pF, 1300pF 1.5pF, 15pF, 150pF, 1500pF, 0.015uF, 0.15uF, 1.5uF, 15uF, 150uF, 1500uF 1.6pF, 16pF, 160pF, 1600pF 1.8pF, 18pF, 180pF, 1800pF 2.0pF, 20pF, 200pF, 2000pF 2.2pF, 22pF, 220pF, 2200pF, 0.022uF, 0.22uF, 2.2uF, 22uF, 220uF, 2200uF 2.4pF, 24pF, 240pF, 2400pF 2.7pF, 27pF, 270pF, 2700pF 3.0pF, 30pF, 300pF, 3000pF 3.3pF, 33pF, 330pF, 3300pF, 0.033uF, 0.33uF, 3.3uF, 33uF, 330uF, 3300uF 3.6pF, 36pF, 360pF, 3600pF 3.9pF, 39pF, 390pF, 3900pF 4.3pF, 43pF, 430pF, 4300pF 4.7pF, 47pF, 470pF, 4700pF, 0.047uF, 0.47uF, 4.7uF, 47uF, 470uF, 4700uF 5.1pF, 51pF, 510pF, 5100pF 5.6pF, 56pF, 560pF, 5600pF 6.2pF, 62pF, 620pF, 6200pF 6.8pF, 68pF, 680pF, 6800pF, 0.068uF, 0.68uF, 6.8uF, 68uF, 680uF, 6800uF 7.5pF, 75pF, 750pF, 7500pF 8.2pF, 82pF, 820pF, 8200pF 9.1pF, 91pF, 910pF, 9100pF #generics #CommonPartsLibrary
jharwinbarrozo
1.5M
Generic Inductor
A generic fixed inductor suitable for rapid circuit topology development. The footprint automatically adapts based on the selected package, supporting standard SMD sizes (e.g., 0402, 0603, 0805) as well as well-known inductor packages such as SDR1806, PA4320, SRN6028, and SRR1260. Standard inductor values: 1.0 nH, 10 nH, 100 nH, 1.0 µH, 10 µH, 100 µH, 1.0 mH 1.2 nH, 12 nH, 120 nH, 1.2 µH, 12 µH, 120 µH, 1.2 mH 1.5 nH, 15 nH, 150 nH, 1.5 µH, 15 µH, 150 µH, 1.5 mH 1.8 nH, 18 nH, 180 nH, 1.8 µH, 18 µH, 180 µH, 1.8 mH 2.2 nH, 22 nH, 220 nH, 2.2 µH, 22 µH, 220 µH, 2.2 mH 2.7 nH, 27 nH, 270 nH, 2.7 µH, 27 µH, 270 µH, 2.7 mH 3.3 nH, 33 nH, 330 nH, 3.3 µH, 33 µH, 330 µH, 3.3 mH 3.9 nH, 39 nH, 390 nH, 3.9 µH, 39 µH, 390 µH, 3.9 mH 4.7 nH, 47 nH, 470 nH, 4.7 µH, 47 µH, 470 µH, 4.7 mH 5.6 nH, 56 nH, 560 nH, 5.6 µH, 56 µH, 560 µH, 5.6 mH 6.8 nH, 68 nH, 680 nH, 6.8 µH, 68 µH, 680 µH, 6.8 mH 8.2 nH, 82 nH, 820 nH, 8.2 µH, 82 µH, 820 µH, 8.2 mH #generics #CommonPartsLibrary
jharwinbarrozo
15.7k
Terminal
An electrical connector acting as reusable interface to a conductor and creating a point where external circuits can be connected.
natarius
RMCF0805JT47K0
47 kOhms ±5% 0.125W, 1/8W Chip Resistor 0805 (2012 Metric) Automotive AEC-Q200 Thick Film #forLedBlink
jharwinbarrozo
1.2M
875105359001
10uF Capacitor Aluminum Polymer 20% 16V SMD 5x5.3mm #forLedBlink #commonpartslibrary #capacitor #aluminumpolymer #radialcan
jharwinbarrozo
1.2M
CTL1206FYW1T
Yellow 595nm LED Indication - Discrete 1.7V 1206 (3216 Metric) #forLedBlink
jharwinbarrozo
1.1M

Project Name

Meshie

Description

Meshie the cheap meshtastic device... probably

Properties

System Architecture

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

Controls

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heyitzsock / Meshie

Schematic