EESchema Schematic File Version 4
LIBS:esp32-sensornode-cache
EELAYER 26 0
EELAYER END
$Descr A4 11693 8268
encoding utf-8
Sheet 1 1
Title "ESP32 Sensor Node with SI7021"
Date "2018-08-01"
Rev "2"
Comp "Jannik Beyerstedt"
Comment1 ""
Comment2 ""
Comment3 ""
Comment4 ""
$EndDescr
$Comp
L Diode:1N4001 D1
U 1 1 5B5EF193
P 9850 5300
F 0 "D1" H 9850 5084 50  0000 C CNN
F 1 "1N4001" H 9850 5175 50  0000 C CNN
F 2 "Diode_THT:D_DO-41_SOD81_P10.16mm_Horizontal" H 9850 5125 50  0001 C CNN
F 3 "http://www.vishay.com/docs/88503/1n4001.pdf" H 9850 5300 50  0001 C CNN
	1    9850 5300
	-1   0    0    1   
$EndComp
$Comp
L Sensor_Humidity:Si7020-A20 U2
U 1 1 5B5EF5BA
P 10250 1950
F 0 "U2" H 10691 1996 50  0000 L CNN
F 1 "Si7021-A20" H 10691 1905 50  0000 L CNN
F 2 "Package_DFN_QFN:DFN-6-1EP_3x3mm_P1mm_EP1.5x2.4mm" H 10250 1550 50  0001 C CNN
F 3 "https://www.silabs.com/documents/public/data-sheets/Si7020-A20.pdf" H 10050 2250 50  0001 C CNN
	1    10250 1950
	1    0    0    -1  
$EndComp
$Comp
L Connector:Conn_01x06_Male J2
U 1 1 5B5EFFB5
P 7850 2850
F 0 "J2" H 7956 3228 50  0000 C CNN
F 1 "FTDI:GRN-GBL" H 7956 3137 50  0000 C CNN
F 2 "Connector_PinHeader_2.54mm:PinHeader_1x06_P2.54mm_Vertical" H 7850 2850 50  0001 C CNN
F 3 "~" H 7850 2850 50  0001 C CNN
	1    7850 2850
	-1   0    0    -1  
$EndComp
$Comp
L Device:Battery_Cell BT1
U 1 1 5B5F4F5C
P 9400 5600
F 0 "BT1" H 9518 5696 50  0000 L CNN
F 1 "18650 Li-Ion" H 9518 5605 50  0000 L CNN
F 2 "JBeyerstedt-Library:BatteryHolder_COMF_BHC-18650-1" V 9400 5660 50  0001 C CNN
F 3 "~" V 9400 5660 50  0001 C CNN
	1    9400 5600
	1    0    0    -1  
$EndComp
$Comp
L JBeyerstedt-Library:ESP32-WROOM U1
U 1 1 5B5F5158
P 5550 3050
F 0 "U1" H 5525 4437 60  0000 C CNN
F 1 "ESP32-WROOM" H 5525 4331 60  0000 C CNN
F 2 "JBeyerstedt-Library:ESP32-WROOM" H 5900 4400 60  0001 C CNN
F 3 "" H 5100 3500 60  0001 C CNN
	1    5550 3050
	1    0    0    -1  
$EndComp
$Comp
L Connector:Conn_01x04_Female J3
U 1 1 5B5F555A
P 7850 1750
F 0 "J3" H 7877 1726 50  0000 L CNN
F 1 "SI7021:SDA-VIN" H 7877 1635 50  0000 L CNN
F 2 "Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical" H 7850 1750 50  0001 C CNN
F 3 "~" H 7850 1750 50  0001 C CNN
	1    7850 1750
	1    0    0    -1  
$EndComp
$Comp
L Device:R R1
U 1 1 5B5F5773
P 3750 2450
F 0 "R1" H 3820 2496 50  0000 L CNN
F 1 "22K" H 3820 2405 50  0000 L CNN
F 2 "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal" V 3680 2450 50  0001 C CNN
F 3 "~" H 3750 2450 50  0001 C CNN
	1    3750 2450
	1    0    0    -1  
$EndComp
$Comp
L Device:R R2
U 1 1 5B5F57E6
P 6000 4400
F 0 "R2" H 5930 4354 50  0000 R CNN
F 1 "22K" H 5930 4445 50  0000 R CNN
F 2 "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal" V 5930 4400 50  0001 C CNN
F 3 "~" H 6000 4400 50  0001 C CNN
	1    6000 4400
	-1   0    0    1   
$EndComp
$Comp
L Device:R R6
U 1 1 5B5F5860
P 9900 3400
F 0 "R6" H 9970 3446 50  0000 L CNN
F 1 "2.7M" H 9970 3355 50  0000 L CNN
F 2 "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal" V 9830 3400 50  0001 C CNN
F 3 "~" H 9900 3400 50  0001 C CNN
	1    9900 3400
	1    0    0    -1  
$EndComp
$Comp
L Connector:Conn_01x03_Male J4
U 1 1 5B5F59C4
P 7850 3750
F 0 "J4" H 7823 3773 50  0000 R CNN
F 1 "BOOT-EXEC" H 7823 3682 50  0000 R CNN
F 2 "Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical" H 7850 3750 50  0001 C CNN
F 3 "~" H 7850 3750 50  0001 C CNN
	1    7850 3750
	-1   0    0    -1  
$EndComp
Text GLabel 10500 5300 2    50   UnSpc ~ 0
VCC
$Comp
L power:GND #PWR011
U 1 1 5B5F5D9E
P 10300 5900
F 0 "#PWR011" H 10300 5650 50  0001 C CNN
F 1 "GND" H 10305 5727 50  0000 C CNN
F 2 "" H 10300 5900 50  0001 C CNN
F 3 "" H 10300 5900 50  0001 C CNN
	1    10300 5900
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR03
U 1 1 5B5F5DE8
P 5100 4650
F 0 "#PWR03" H 5100 4400 50  0001 C CNN
F 1 "GND" H 5105 4477 50  0000 C CNN
F 2 "" H 5100 4650 50  0001 C CNN
F 3 "" H 5100 4650 50  0001 C CNN
	1    5100 4650
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR05
U 1 1 5B5F66D5
P 6750 2150
F 0 "#PWR05" H 6750 1900 50  0001 C CNN
F 1 "GND" H 6755 1977 50  0000 C CNN
F 2 "" H 6750 2150 50  0001 C CNN
F 3 "" H 6750 2150 50  0001 C CNN
	1    6750 2150
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR02
U 1 1 5B5F6760
P 4300 2150
F 0 "#PWR02" H 4300 1900 50  0001 C CNN
F 1 "GND" H 4305 1977 50  0000 C CNN
F 2 "" H 4300 2150 50  0001 C CNN
F 3 "" H 4300 2150 50  0001 C CNN
	1    4300 2150
	1    0    0    -1  
$EndComp
Wire Wire Line
	4600 2450 4600 2100
Wire Wire Line
	4600 2100 4300 2100
Wire Wire Line
	6450 2450 6550 2450
Wire Wire Line
	6550 2450 6550 2100
Wire Wire Line
	6550 2100 6750 2100
Wire Wire Line
	5100 4100 5100 4650
Text GLabel 3650 2100 0    50   UnSpc ~ 0
VCC
$Comp
L power:GND #PWR06
U 1 1 5B5F7496
P 7450 3150
F 0 "#PWR06" H 7450 2900 50  0001 C CNN
F 1 "GND" H 7455 2977 50  0000 C CNN
F 2 "" H 7450 3150 50  0001 C CNN
F 3 "" H 7450 3150 50  0001 C CNN
	1    7450 3150
	1    0    0    -1  
$EndComp
Wire Wire Line
	7650 3750 7200 3750
$Comp
L power:GND #PWR08
U 1 1 5B5F7BAE
P 7450 3850
F 0 "#PWR08" H 7450 3600 50  0001 C CNN
F 1 "GND" H 7455 3677 50  0000 C CNN
F 2 "" H 7450 3850 50  0001 C CNN
F 3 "" H 7450 3850 50  0001 C CNN
	1    7450 3850
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR07
U 1 1 5B5F7C2E
P 7450 2000
F 0 "#PWR07" H 7450 1750 50  0001 C CNN
F 1 "GND" H 7455 1827 50  0000 C CNN
F 2 "" H 7450 2000 50  0001 C CNN
F 3 "" H 7450 2000 50  0001 C CNN
	1    7450 2000
	1    0    0    -1  
$EndComp
Text GLabel 7450 1650 0    50   UnSpc ~ 0
VCC
Wire Wire Line
	7650 3150 7450 3150
Wire Wire Line
	7650 3850 7450 3850
Text GLabel 7450 3650 0    50   UnSpc ~ 0
VCC
Wire Wire Line
	7650 3650 7450 3650
$Comp
L Device:R R3
U 1 1 5B5FD2E5
P 7050 3750
F 0 "R3" V 6843 3750 50  0000 C CNN
F 1 "22K" V 6934 3750 50  0000 C CNN
F 2 "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal" V 6980 3750 50  0001 C CNN
F 3 "~" H 7050 3750 50  0001 C CNN
	1    7050 3750
	0    1    1    0   
$EndComp
$Comp
L power:GND #PWR04
U 1 1 5B6001C1
P 6000 4650
F 0 "#PWR04" H 6000 4400 50  0001 C CNN
F 1 "GND" H 6005 4477 50  0000 C CNN
F 2 "" H 6000 4650 50  0001 C CNN
F 3 "" H 6000 4650 50  0001 C CNN
	1    6000 4650
	1    0    0    -1  
$EndComp
Wire Wire Line
	6000 4100 6000 4250
Wire Wire Line
	6000 4550 6000 4650
$Comp
L power:GND #PWR09
U 1 1 5B601E2F
P 8050 6200
F 0 "#PWR09" H 8050 5950 50  0001 C CNN
F 1 "GND" H 8055 6027 50  0000 C CNN
F 2 "" H 8050 6200 50  0001 C CNN
F 3 "" H 8050 6200 50  0001 C CNN
	1    8050 6200
	1    0    0    -1  
$EndComp
Text GLabel 7300 5300 0    50   UnSpc ~ 0
VCC
$Comp
L Device:C C1
U 1 1 5B6101CB
P 3750 2850
F 0 "C1" H 3865 2896 50  0000 L CNN
F 1 "1n" H 3865 2805 50  0000 L CNN
F 2 "Capacitor_THT:C_Axial_L3.8mm_D2.6mm_P7.50mm_Horizontal" H 3788 2700 50  0001 C CNN
F 3 "~" H 3750 2850 50  0001 C CNN
	1    3750 2850
	1    0    0    -1  
$EndComp
$Comp
L Device:C C3
U 1 1 5B610407
P 10300 5550
F 0 "C3" H 10415 5596 50  0000 L CNN
F 1 "1u" H 10415 5505 50  0000 L CNN
F 2 "Capacitor_THT:C_Rect_L4.6mm_W3.8mm_P2.50mm_MKS02_FKP02" H 10338 5400 50  0001 C CNN
F 3 "~" H 10300 5550 50  0001 C CNN
	1    10300 5550
	1    0    0    -1  
$EndComp
$Comp
L Device:C C2
U 1 1 5B61048F
P 9000 1650
F 0 "C2" H 9115 1696 50  0000 L CNN
F 1 "0.1u" H 9115 1605 50  0000 L CNN
F 2 "Capacitor_SMD:C_0805_2012Metric_Pad1.15x1.40mm_HandSolder" H 9038 1500 50  0001 C CNN
F 3 "~" H 9000 1650 50  0001 C CNN
	1    9000 1650
	1    0    0    -1  
$EndComp
Wire Wire Line
	4600 2550 4150 2550
Wire Wire Line
	4150 2550 4150 2100
Wire Wire Line
	4150 2100 3750 2100
$Comp
L power:GND #PWR01
U 1 1 5B61A48C
P 3750 3100
F 0 "#PWR01" H 3750 2850 50  0001 C CNN
F 1 "GND" H 3755 2927 50  0000 C CNN
F 2 "" H 3750 3100 50  0001 C CNN
F 3 "" H 3750 3100 50  0001 C CNN
	1    3750 3100
	1    0    0    -1  
$EndComp
Wire Wire Line
	3750 2650 3750 2700
Wire Wire Line
	3750 2650 3750 2600
Connection ~ 3750 2650
Wire Wire Line
	3750 2300 3750 2100
Connection ~ 3750 2100
Wire Wire Line
	3750 2100 3650 2100
$Comp
L Device:R R7
U 1 1 5B628838
P 9900 3800
F 0 "R7" H 9970 3846 50  0000 L CNN
F 1 "1M" H 9970 3755 50  0000 L CNN
F 2 "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal" V 9830 3800 50  0001 C CNN
F 3 "~" H 9900 3800 50  0001 C CNN
	1    9900 3800
	1    0    0    -1  
$EndComp
Text GLabel 4600 2750 0    50   Input ~ 0
VCC_SENS
Text GLabel 9700 3600 0    50   Output ~ 0
VCC_SENS
Text GLabel 8900 1400 0    50   Input ~ 0
VCC
Text GLabel 9700 3150 0    50   UnSpc ~ 0
VCC
$Comp
L power:GND #PWR010
U 1 1 5B62C522
P 8900 2400
F 0 "#PWR010" H 8900 2150 50  0001 C CNN
F 1 "GND" H 8905 2227 50  0000 C CNN
F 2 "" H 8900 2400 50  0001 C CNN
F 3 "" H 8900 2400 50  0001 C CNN
	1    8900 2400
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR012
U 1 1 5B62C54F
P 9900 4050
F 0 "#PWR012" H 9900 3800 50  0001 C CNN
F 1 "GND" H 9905 3877 50  0000 C CNN
F 2 "" H 9900 4050 50  0001 C CNN
F 3 "" H 9900 4050 50  0001 C CNN
	1    9900 4050
	1    0    0    -1  
$EndComp
Wire Wire Line
	9900 3250 9900 3150
Wire Wire Line
	9900 3150 9700 3150
Wire Wire Line
	9700 3600 9900 3600
Wire Wire Line
	9900 3600 9900 3550
Wire Wire Line
	9900 3600 9900 3650
Connection ~ 9900 3600
Wire Wire Line
	9900 3950 9900 4000
$Comp
L Device:R R5
U 1 1 5B640572
P 9600 1650
F 0 "R5" H 9670 1696 50  0000 L CNN
F 1 "22K" H 9670 1605 50  0000 L CNN
F 2 "Resistor_SMD:R_0805_2012Metric_Pad1.15x1.40mm_HandSolder" V 9530 1650 50  0001 C CNN
F 3 "~" H 9600 1650 50  0001 C CNN
	1    9600 1650
	1    0    0    -1  
$EndComp
$Comp
L Device:R R4
U 1 1 5B6405FC
P 9300 1650
F 0 "R4" H 9370 1696 50  0000 L CNN
F 1 "22K" H 9370 1605 50  0000 L CNN
F 2 "Resistor_SMD:R_0805_2012Metric_Pad1.15x1.40mm_HandSolder" V 9230 1650 50  0001 C CNN
F 3 "~" H 9300 1650 50  0001 C CNN
	1    9300 1650
	1    0    0    -1  
$EndComp
Wire Wire Line
	10150 2250 10150 2350
Wire Wire Line
	9600 1850 9600 1800
Wire Wire Line
	8900 2350 8900 2400
Wire Wire Line
	9000 1800 9000 2350
Connection ~ 9000 2350
Wire Wire Line
	9000 2350 8900 2350
Wire Wire Line
	8900 1400 9000 1400
Wire Wire Line
	9000 1400 9000 1500
Wire Wire Line
	9000 1400 9300 1400
Wire Wire Line
	10250 1400 10250 1650
Connection ~ 9000 1400
Wire Wire Line
	9300 1500 9300 1400
Connection ~ 9300 1400
Wire Wire Line
	9300 1400 9600 1400
Wire Wire Line
	9600 1500 9600 1400
Connection ~ 9600 1400
Wire Wire Line
	9600 1400 10250 1400
Wire Wire Line
	9750 2050 9300 2050
Wire Wire Line
	9300 2050 9300 1800
Wire Wire Line
	9000 2350 10150 2350
Text Label 7600 2750 0    50   ~ 0
TX
Text Label 7500 2850 0    50   ~ 0
RX
$Comp
L Switch:SW_Push SW1
U 1 1 5B61DE7C
P 3350 2650
F 0 "SW1" H 3350 2935 50  0000 C CNN
F 1 "EN" H 3350 2844 50  0000 C CNN
F 2 "Button_Switch_THT:SW_PUSH_6mm" H 3350 2850 50  0001 C CNN
F 3 "" H 3350 2850 50  0001 C CNN
	1    3350 2650
	1    0    0    -1  
$EndComp
Wire Wire Line
	3150 2650 3000 2650
$Comp
L Device:R R8
U 1 1 5B64D8D2
P 3000 2850
F 0 "R8" H 3070 2896 50  0000 L CNN
F 1 "47R" H 3070 2805 50  0000 L CNN
F 2 "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal" V 2930 2850 50  0001 C CNN
F 3 "~" H 3000 2850 50  0001 C CNN
	1    3000 2850
	1    0    0    -1  
$EndComp
Wire Wire Line
	3000 2650 3000 2700
Wire Wire Line
	3000 3000 3000 3050
$Comp
L Device:C C4
U 1 1 5B668915
P 10250 3800
F 0 "C4" H 10365 3846 50  0000 L CNN
F 1 "0.1u" H 10365 3755 50  0000 L CNN
F 2 "Capacitor_SMD:C_0805_2012Metric_Pad1.15x1.40mm_HandSolder" H 10288 3650 50  0001 C CNN
F 3 "~" H 10250 3800 50  0001 C CNN
	1    10250 3800
	1    0    0    -1  
$EndComp
Wire Wire Line
	9900 3600 10250 3600
Wire Wire Line
	10250 3600 10250 3650
Wire Wire Line
	10250 3950 10250 4000
Wire Wire Line
	10250 4000 9900 4000
Connection ~ 9900 4000
Wire Wire Line
	9900 4000 9900 4050
$Comp
L JBeyerstedt-Library:JTAG_ESP32 J1
U 1 1 5B6839CC
P 7650 5750
F 0 "J1" H 7700 6275 50  0000 C CNN
F 1 "JTAG_ESP32" H 7700 6184 50  0000 C CNN
F 2 "Connector_PinHeader_2.54mm:PinHeader_2x07_P2.54mm_Vertical" H 7650 5750 50  0001 C CNN
F 3 "~" H 7650 5750 50  0001 C CNN
	1    7650 5750
	1    0    0    -1  
$EndComp
Wire Wire Line
	7350 5450 7450 5450
Wire Wire Line
	7950 5550 8050 5550
Wire Wire Line
	8050 5550 8050 5650
Wire Wire Line
	8050 6050 7950 6050
Wire Wire Line
	8050 5950 7950 5950
Connection ~ 8050 5950
Wire Wire Line
	8050 5950 8050 6050
Wire Wire Line
	7950 5850 8050 5850
Connection ~ 8050 5850
Wire Wire Line
	8050 5850 8050 5950
Wire Wire Line
	7950 5750 8050 5750
Connection ~ 8050 5750
Wire Wire Line
	8050 5750 8050 5850
Wire Wire Line
	7950 5650 8050 5650
Connection ~ 8050 5650
Wire Wire Line
	8050 5650 8050 5750
Wire Wire Line
	8050 6200 8050 6150
Connection ~ 8050 6050
Wire Wire Line
	7450 6050 5900 6050
Wire Wire Line
	7450 5950 7350 5950
Wire Wire Line
	7350 5950 7350 6150
Wire Wire Line
	7350 6150 8050 6150
Connection ~ 8050 6150
Wire Wire Line
	8050 6150 8050 6050
Wire Wire Line
	7450 5850 5200 5850
Wire Wire Line
	7300 5300 7350 5300
Wire Wire Line
	7350 5300 7350 5450
Wire Wire Line
	9400 5700 9400 5800
Wire Wire Line
	9400 5800 10300 5800
Wire Wire Line
	10300 5700 10300 5800
Connection ~ 10300 5800
Wire Wire Line
	10300 5800 10300 5900
Wire Wire Line
	3750 3000 3750 3050
Wire Wire Line
	3550 2650 3750 2650
Wire Wire Line
	3000 3050 3750 3050
Connection ~ 3750 3050
Wire Wire Line
	3750 3050 3750 3100
Wire Wire Line
	10300 5300 10500 5300
Wire Wire Line
	10300 5300 10300 5400
Wire Wire Line
	9700 5300 9400 5300
Wire Wire Line
	9400 5300 9400 5400
Wire Wire Line
	10000 5300 10300 5300
Connection ~ 10300 5300
Text GLabel 8800 1850 0    50   Input ~ 0
SDA
Text GLabel 8800 2050 0    50   Input ~ 0
SCL
Wire Wire Line
	8800 1850 9600 1850
Connection ~ 9600 1850
Wire Wire Line
	9600 1850 9750 1850
Text GLabel 6450 2950 2    50   Input ~ 0
SDA
Text GLabel 6450 2650 2    50   Input ~ 0
SCL
Text GLabel 7350 1850 0    50   Input ~ 0
SCL
Text GLabel 7350 1950 0    50   Input ~ 0
SDA
Wire Wire Line
	9300 2050 8800 2050
Connection ~ 9300 2050
Wire Wire Line
	7350 1850 7650 1850
Wire Wire Line
	7650 1950 7350 1950
Wire Wire Line
	7450 2000 7450 1750
Wire Wire Line
	7450 1750 7650 1750
Wire Wire Line
	7450 1650 7650 1650
Wire Wire Line
	6450 3750 6900 3750
Wire Wire Line
	6450 2850 7650 2850
Wire Wire Line
	6450 2750 7650 2750
Text Label 6550 3750 0    50   ~ 0
BOOT
Wire Wire Line
	3750 2650 4100 2650
Wire Wire Line
	5200 4100 5200 5850
Wire Wire Line
	5900 4100 5900 6050
Wire Wire Line
	4400 3750 4400 5650
Wire Wire Line
	4250 3650 4250 5750
Wire Wire Line
	4250 5750 7450 5750
Wire Wire Line
	4400 5650 7450 5650
Wire Wire Line
	4100 5550 7450 5550
Wire Wire Line
	4250 3650 4600 3650
Wire Wire Line
	4400 3750 4600 3750
Wire Wire Line
	4100 2650 4100 5550
Connection ~ 4100 2650
Wire Wire Line
	4100 2650 4600 2650
Wire Wire Line
	6750 2100 6750 2150
Wire Wire Line
	4300 2100 4300 2150
$EndSCHEMATC