EESchema Schematic File Version 4
EELAYER 30 0
EELAYER END
$Descr A4 11693 8268
encoding utf-8
Sheet 1 1
Title ""
Date ""
Rev ""
Comp ""
Comment1 ""
Comment2 ""
Comment3 ""
Comment4 ""
$EndDescr
$Comp
L Device:Battery_Cell BT?
U 1 1 5E45BF9D
P 1100 5900
F 0 "BT?" H 1218 5996 50  0000 L CNN
F 1 "LiIon battery 4.2V" H 1218 5905 50  0000 L CNN
F 2 "" V 1100 5960 50  0001 C CNN
F 3 "~" V 1100 5960 50  0001 C CNN
	1    1100 5900
	1    0    0    -1  
$EndComp
$Comp
L power:VCC #PWR?
U 1 1 5E45DBB8
P 4750 1550
F 0 "#PWR?" H 4750 1400 50  0001 C CNN
F 1 "VCC" H 4767 1723 50  0000 C CNN
F 2 "" H 4750 1550 50  0001 C CNN
F 3 "" H 4750 1550 50  0001 C CNN
	1    4750 1550
	1    0    0    -1  
$EndComp
Wire Wire Line
	5500 2700 4750 2700
Wire Wire Line
	7400 2400 8250 2400
Wire Wire Line
	8250 2400 8250 3500
$Comp
L power:GND #PWR?
U 1 1 5E45E3CE
P 8250 4800
F 0 "#PWR?" H 8250 4550 50  0001 C CNN
F 1 "GND" H 8255 4627 50  0000 C CNN
F 2 "" H 8250 4800 50  0001 C CNN
F 3 "" H 8250 4800 50  0001 C CNN
	1    8250 4800
	1    0    0    -1  
$EndComp
$Comp
L Device:D D?
U 1 1 5E45E9FB
P 6450 3200
F 0 "D?" H 6450 3416 50  0000 C CNN
F 1 "1N4148" H 6450 3325 50  0000 C CNN
F 2 "" H 6450 3200 50  0001 C CNN
F 3 "~" H 6450 3200 50  0001 C CNN
	1    6450 3200
	1    0    0    -1  
$EndComp
$Comp
L Device:D D?
U 1 1 5E460F99
P 6450 3900
F 0 "D?" H 6450 4116 50  0000 C CNN
F 1 "1N4148" H 6450 4025 50  0000 C CNN
F 2 "" H 6450 3900 50  0001 C CNN
F 3 "~" H 6450 3900 50  0001 C CNN
	1    6450 3900
	1    0    0    -1  
$EndComp
Wire Wire Line
	5500 2500 5150 2500
Wire Wire Line
	5150 2500 5150 3200
Wire Wire Line
	6600 3200 7600 3200
Wire Wire Line
	7600 3200 7600 2600
Wire Wire Line
	7600 2600 7400 2600
Wire Wire Line
	6300 3900 6050 3900
$Comp
L Switch:SW_Push SW?
U 1 1 5E464354
P 9150 2950
F 0 "SW?" H 9150 3235 50  0000 C CNN
F 1 "Contact Door (Empty)" H 9150 3144 50  0000 C CNN
F 2 "" H 9150 3150 50  0001 C CNN
F 3 "~" H 9150 3150 50  0001 C CNN
	1    9150 2950
	1    0    0    -1  
$EndComp
$Comp
L Switch:SW_Push SW?
U 1 1 5E464FC2
P 9150 3550
F 0 "SW?" H 9150 3835 50  0000 C CNN
F 1 "Contact Mailbox" H 9150 3744 50  0000 C CNN
F 2 "" H 9150 3750 50  0001 C CNN
F 3 "~" H 9150 3750 50  0001 C CNN
	1    9150 3550
	1    0    0    -1  
$EndComp
$Comp
L Device:CP C?
U 1 1 5E465EAF
P 7350 4150
F 0 "C?" V 7605 4150 50  0000 C CNN
F 1 "47u" V 7514 4150 50  0000 C CNN
F 2 "" H 7388 4000 50  0001 C CNN
F 3 "~" H 7350 4150 50  0001 C CNN
	1    7350 4150
	0    -1   -1   0   
$EndComp
$Comp
L Device:R R?
U 1 1 5E465EB5
P 7350 3800
F 0 "R?" V 7557 3800 50  0000 C CNN
F 1 "100k" V 7466 3800 50  0000 C CNN
F 2 "" V 7280 3800 50  0001 C CNN
F 3 "~" H 7350 3800 50  0001 C CNN
	1    7350 3800
	0    -1   -1   0   
$EndComp
Wire Wire Line
	7500 4150 7600 4150
Wire Wire Line
	7500 3800 7600 3800
Wire Wire Line
	6600 3900 7100 3900
Wire Wire Line
	7100 3900 7100 3800
Wire Wire Line
	7100 3800 7200 3800
Wire Wire Line
	7100 3900 7100 4150
Wire Wire Line
	7100 4150 7200 4150
Connection ~ 7100 3900
Wire Wire Line
	7600 4150 7600 3900
Wire Wire Line
	7600 3900 8950 3900
Connection ~ 7600 3900
Wire Wire Line
	7600 3900 7600 3800
Wire Wire Line
	4750 1650 9950 1650
Wire Wire Line
	9950 1650 9950 2950
Wire Wire Line
	9950 3550 9350 3550
Connection ~ 4750 1650
Wire Wire Line
	4750 1650 4750 1550
Wire Wire Line
	9350 2950 9950 2950
Connection ~ 9950 2950
Wire Wire Line
	9950 2950 9950 3550
Wire Wire Line
	7400 2950 7900 2950
Wire Wire Line
	7400 2700 7400 2950
$Comp
L Device:D D?
U 1 1 5E469199
P 6450 3500
F 0 "D?" H 6450 3716 50  0000 C CNN
F 1 "1N4148" H 6450 3625 50  0000 C CNN
F 2 "" H 6450 3500 50  0001 C CNN
F 3 "~" H 6450 3500 50  0001 C CNN
	1    6450 3500
	1    0    0    -1  
$EndComp
Connection ~ 7400 2950
Wire Wire Line
	6050 3200 6050 3500
Connection ~ 6050 3200
Wire Wire Line
	6050 3200 6300 3200
Wire Wire Line
	6300 3500 6050 3500
Connection ~ 6050 3500
Wire Wire Line
	6050 3500 6050 3900
Wire Wire Line
	6600 3500 7400 3500
Wire Wire Line
	7400 2950 7400 3500
Wire Wire Line
	8950 3900 8950 3550
$Comp
L power:GND #PWR?
U 1 1 5E471827
P 1100 6200
F 0 "#PWR?" H 1100 5950 50  0001 C CNN
F 1 "GND" H 1105 6027 50  0000 C CNN
F 2 "" H 1100 6200 50  0001 C CNN
F 3 "" H 1100 6200 50  0001 C CNN
	1    1100 6200
	1    0    0    -1  
$EndComp
Wire Wire Line
	5500 2600 5500 2700
$Comp
L Device:R R?
U 1 1 5E475105
P 7900 3250
F 0 "R?" H 7970 3296 50  0000 L CNN
F 1 "180k" H 7970 3205 50  0000 L CNN
F 2 "" V 7830 3250 50  0001 C CNN
F 3 "~" H 7900 3250 50  0001 C CNN
	1    7900 3250
	1    0    0    -1  
$EndComp
Wire Wire Line
	7900 3100 7900 2950
Connection ~ 7900 2950
Wire Wire Line
	7900 2950 8950 2950
Wire Wire Line
	7900 3400 7900 3500
Wire Wire Line
	7900 3500 8250 3500
Connection ~ 8250 3500
Wire Wire Line
	5150 3200 6050 3200
$Comp
L Device:R R?
U 1 1 5E478127
P 7100 4500
F 0 "R?" H 7170 4546 50  0000 L CNN
F 1 "56k" H 7170 4455 50  0000 L CNN
F 2 "" V 7030 4500 50  0001 C CNN
F 3 "~" H 7100 4500 50  0001 C CNN
	1    7100 4500
	1    0    0    -1  
$EndComp
Wire Wire Line
	7100 4350 7100 4150
Connection ~ 7100 4150
Wire Wire Line
	7100 4650 7100 4700
Wire Wire Line
	7100 4700 8250 4700
Wire Wire Line
	8250 4700 8250 4800
Wire Wire Line
	8250 3500 8250 4700
Connection ~ 8250 4700
Connection ~ 5500 2700
$Comp
L ESP8266:ESP-01v090 U?
U 1 1 5E45B0FB
P 6450 2550
F 0 "U?" H 6450 3065 50  0000 C CNN
F 1 "ESP-01v090" H 6450 2974 50  0000 C CNN
F 2 "" H 6450 2550 50  0001 C CNN
F 3 "http://l0l.org.uk/2014/12/esp8266-modules-hardware-guide-gotta-catch-em-all/" H 6450 2550 50  0001 C CNN
	1    6450 2550
	1    0    0    -1  
$EndComp
$Comp
L Device:R R?
U 1 1 6054F7DD
P 5150 3650
F 0 "R?" H 5220 3696 50  0000 L CNN
F 1 "180k" H 5220 3605 50  0000 L CNN
F 2 "" V 5080 3650 50  0001 C CNN
F 3 "~" H 5150 3650 50  0001 C CNN
	1    5150 3650
	1    0    0    -1  
$EndComp
Wire Wire Line
	5150 3500 5150 3200
Connection ~ 5150 3200
Wire Wire Line
	5150 3800 5150 4700
Wire Wire Line
	5150 4700 7100 4700
Connection ~ 7100 4700
Wire Wire Line
	4750 1650 4750 2700
$Comp
L Diode:1N4001 D?
U 1 1 60581C0F
P 1550 5400
F 0 "D?" H 1550 5184 50  0000 C CNN
F 1 "1N4001" H 1550 5275 50  0000 C CNN
F 2 "Diode_THT:D_DO-41_SOD81_P10.16mm_Horizontal" H 1550 5225 50  0001 C CNN
F 3 "http://www.vishay.com/docs/88503/1n4001.pdf" H 1550 5400 50  0001 C CNN
	1    1550 5400
	-1   0    0    1   
$EndComp
$Comp
L power:VCC #PWR?
U 1 1 60582FCC
P 1900 5250
F 0 "#PWR?" H 1900 5100 50  0001 C CNN
F 1 "VCC" H 1917 5423 50  0000 C CNN
F 2 "" H 1900 5250 50  0001 C CNN
F 3 "" H 1900 5250 50  0001 C CNN
	1    1900 5250
	1    0    0    -1  
$EndComp
Wire Wire Line
	1700 5400 1900 5400
Wire Wire Line
	1900 5400 1900 5250
Wire Wire Line
	1400 5400 1100 5400
Wire Wire Line
	1100 5400 1100 5700
Wire Wire Line
	1100 6200 1100 6000
Text Notes 1050 5000 0    50   ~ 0
Supply Variant 2\nLiIon 18650 cell, 4.2V\nand diode to reduce voltage
Text Notes 1000 6850 0    50   ~ 0
Due to diode characteristic, voltage with no load \n(ESP in power down/deep sleep) will be too high, \nwhich causes the ESP8266 to consume much more \nthan expected in deep sleep (~230 µA at 3.8 V). \n-> not the best solution
$Comp
L Device:Battery BT?
U 1 1 60592FAF
P 1100 2100
F 0 "BT?" H 1208 2146 50  0000 L CNN
F 1 "2x Lithium AA cell" H 1208 2055 50  0000 L CNN
F 2 "" V 1100 2160 50  0001 C CNN
F 3 "~" V 1100 2160 50  0001 C CNN
	1    1100 2100
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR?
U 1 1 605940F1
P 1100 2450
F 0 "#PWR?" H 1100 2200 50  0001 C CNN
F 1 "GND" H 1105 2277 50  0000 C CNN
F 2 "" H 1100 2450 50  0001 C CNN
F 3 "" H 1100 2450 50  0001 C CNN
	1    1100 2450
	1    0    0    -1  
$EndComp
Wire Wire Line
	1100 2450 1100 2300
$Comp
L power:VCC #PWR?
U 1 1 6059606D
P 1100 1700
F 0 "#PWR?" H 1100 1550 50  0001 C CNN
F 1 "VCC" H 1117 1873 50  0000 C CNN
F 2 "" H 1100 1700 50  0001 C CNN
F 3 "" H 1100 1700 50  0001 C CNN
	1    1100 1700
	1    0    0    -1  
$EndComp
Wire Wire Line
	1100 1900 1100 1700
Text Notes 1050 1400 0    50   ~ 0
Supply Variant 1\n2x 1-way Lithium AA cells, 1.5 V in series 
Text Notes 1400 1750 0    50   ~ 0
This variant proved to work well even at temperatures below 0°C. \nBattery lasted for more than a year (ESP active 1-2x per day). \nESP consumption in deep sleep/power down is <10 µA. 
Text Notes 4950 5400 0    50   ~ 0
ESP is powered down until one of the contacts triggers CH_PD input. \n-> ESP wakes up and sets GPIO0 to high -> CH_PD stays high until software \nswitches off GPIO0 -> ESP is powered down immediately after it sent the MQTT message. 
$Comp
L Device:Battery BT?
U 1 1 6057A22A
P 1100 3750
F 0 "BT?" H 1208 3796 50  0000 L CNN
F 1 "2x Lithium AA cell" H 1208 3705 50  0000 L CNN
F 2 "" V 1100 3810 50  0001 C CNN
F 3 "~" V 1100 3810 50  0001 C CNN
	1    1100 3750
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR?
U 1 1 6057A230
P 1100 4100
F 0 "#PWR?" H 1100 3850 50  0001 C CNN
F 1 "GND" H 1105 3927 50  0000 C CNN
F 2 "" H 1100 4100 50  0001 C CNN
F 3 "" H 1100 4100 50  0001 C CNN
	1    1100 4100
	1    0    0    -1  
$EndComp
Wire Wire Line
	1100 4100 1100 3950
$Comp
L power:VCC #PWR?
U 1 1 6057A237
P 1100 3350
F 0 "#PWR?" H 1100 3200 50  0001 C CNN
F 1 "VCC" H 1117 3523 50  0000 C CNN
F 2 "" H 1100 3350 50  0001 C CNN
F 3 "" H 1100 3350 50  0001 C CNN
	1    1100 3350
	1    0    0    -1  
$EndComp
Wire Wire Line
	1100 3550 1100 3350
Text Notes 1050 3050 0    50   ~ 0
Supply Variant 1a\n1x 1-way Lithium CR-V3 cell, 3 V
Text Notes 1400 3250 0    50   ~ 0
Same as 2x Lithium AA cell, 1.5 V, in series
$EndSCHEMATC