RTK1010-PCB-BOM

Note regarding optional components:

U2 is the 5V to 3.3V LDO - C1 should be populated too

If you like easy USB flashing of the ESP (only USB connected) U2 is required otherwise the ESP does not gets 3.3V power (JP2 must be cloosed too).

The alternative flashing/power method is to supply 3.3V and solder your serial adapter to the uart probe points.

If U2 is populated the IOREF (3.3V) at the arduino pin header should not be connected !
C6 & U3 are required if the antenna requires more than 30mA LNA.

This way you can supply up to 250mA LNA to active antennas.
C10 can stabelize the LNA voltage if it flucturates. (maybe required if you want to use a different antenna)

If you like to tinker more with the board you may want to populate more 0805 100Ω resistors - check the schematics to decide if you need them.

BOM A)

Amount	Placement	Description	Reichelt Part#	Mouser Part#
1	U1	RTK-1010	❌	❌
2	C11,C13	tantalum 47µF/10V	SMD TAN.47/10
5	C4,C5,C7,C8,C9	0805 capacitor 100nF/50V	KEM Z5U0805 100N
2	R7,R8	0805 resistor 100Ω	SMD-0805 100
1	R15	0805 resistor 10kΩ	SMD-0805 10,0K
2	L1,L3	0805 inductor 39nH	L-0805AS 39N
1	J2	U.FL/I-PEX/SMA connector	❌	73412-0110
1	L1/L5 GPS	Linx active GPS antenna	❌	ANT-GNCP-C25L15100
1	BT1	CR2032 holder	KEYSTONE 1058
1	(BT1)	CR2032	CR2032
	Optional:
1	U3	GPS LNA 3.3V LDO	MCP 1700-3302 MCP 1702T-3302E
1	C6	0805 capacitor 100nF/50V	KEM Z5U0805 100N

1	C10	tantalum 47µF/10V	SMD TAN.47/10

BOM B)

Amount	Placement	Description	Reichelt Part#	Mouser Part#
1	U1	RTK-1010	❌	❌
1	U2	3.3V LDO	NCP 1117 ST33T3G
3	C11,C12,C13	tantalum 47µF/10V	SMD TAN.47/10
2	C2,C3	0805 capacitor 100pF/50V	KEM C0G0805 100P
6	C1,C4,C5,C7,C8,C9	0805 capacitor 100nF/50V	KEM Z5U0805 100N
4	R4,R5,R13,R14	0805 resistor 100Ω	SMD-0805 100
2	R15,R16	0805 resistor 10kΩ	SMD-0805 10,0K
2	L1,L3	0805 inductor 39nH	L-0805AS 39N
1	J2	U.FL/I-PEX/SMA connector	❌	73412-0110
1	L1/L5 GPS	Linx active GPS antenna	❌	ANT-GNCP-C25L15100
1	BT1	CR2032 holder	KEYSTONE 1058
1	(BT1)	CR2032	CR2032
1	J3	USB socket	❌	649-10118194-0001LF
1	U4	ESP32-S2	ESP32S2WROVERI4 (sma antenna) or ESP32-S2-WROVER (pcb antenna)	ESP32-S2-WROVER-I (sma antenna) or ESP32-S2-WROVER (pcb antenna)
1	TP_BOOT1/TP_GND1	ESP boot header	Header
1		ESP boot jumper	Jumper
	Optional:
1	U3	GPS LNA 3.3V LDO	MCP 1700-3302 MCP 1702T-3302E
1	C6	0805 capacitor 100nF/50V	KEM Z5U0805 100N

1	C10	tantalum 47µF/10V	SMD TAN.47/10

BOM C)

Amount	Placement	Description	Reichelt Part#	Mouser Part#
1	U1	RTK-1010	❌	❌
3	C11,C12,C13	tantalum 47µF/10V	SMD TAN.47/10
2	C2,C3	0805 capacitor 100pF/50V	KEM C0G0805 100P
5	C4,C5,C7,C8,C9	0805 capacitor 100nF/50V	KEM Z5U0805 100N
4	R4,R5,R13,R14	0805 resistor 100Ω	SMD-0805 100
4	R15,R16,R17,R18	0805 resistor 10kΩ	SMD-0805 10,0K
2	L1,L3	0805 inductor 39nH	L-0805AS 39N
1	J2	U.FL/I-PEX/SMA connector	❌	73412-0110
1	L1/L5 GPS	Linx active GPS antenna	❌	ANT-GNCP-C25L15100
1	BT1	CR2032 holder	KEYSTONE 1058
1	(BT1)	CR2032	CR2032
1	U4	ESP32-S2	ESP32S2WROVERI4 (sma antenna) or ESP32-S2-WROVER (pcb antenna)	ESP32-S2-WROVER-I (sma antenna) or ESP32-S2-WROVER (pcb antenna)
1	J4	IMU connector	2,54 mm, 1X08
1	J5	Micro Match SMD socket	MPE 374-2-008
1	(J5)	Micro Match Connector	MPE 372-1-008
1	TP_BOOT1/TP_GND1	ESP boot header	Header
1		ESP boot jumper	Jumper
	Optional:
1	U2	3.3V LDO	NCP 1117 ST33T3G
1	C1	0805 capacitor 100nF/50V	KEM Z5U0805 100N
1	J3	USB socket	❌	649-10118194-0001LF

1	U3	GPS LNA 3.3V LDO	MCP 1700-3302 MCP 1702T-3302E
1	C6	0805 capacitor 100nF/50V	KEM Z5U0805 100N

1	C10	tantalum 47µF/10V	SMD TAN.47/10

Confirmed Working	Antenna	Internal / External	U.FL/I-PEX	SMA	Source	Notes
✔	Linx ANT-GNCP-C25L15100	I	✔	❌	Mouser DigiKey
✔	Linx ANT-GNRM-L15A	E	❌	✔	Mouser DigiKey	Metallic ground plane recommended
❓	u-blox ANN-MB1-00	E	❌	✔	u-blox Mouser DigiKey
❓	ArduSimple OEM Survey (Tri-band)	I	❌	✔	ArduSimple
❓	ArduSimple Budget Survey (Tri-band)	E	❌	✔	ArduSimple	The antenna itself has a TNC connector - includes 2,5M TNC-SMA cable