Schematic
ESP8266
V C C Range:
1.7 V -> 3 .6 V
SJ 2 c a n b e c u t t o
disa b l e t h e p o w er
LE D . ( S a v in g
lo ts of p o w e r.)
A uto -re se t c ir cu it b a se d o n N o d e M C U D e v K it
G P IO 2 pu lle d u p in I2 C s ec tio n
V_ B A T T s h o u ld be a s i n gle-
ce ll L iP o b a tt e ry.
Ch a rg e c u rre n t:
I_C H G = 1 0 0 0 / R _ PR O G
R _ PR O G = 2 k : I _ C H G = 5 0 0 m A
SJ 1 c a n b e c u t t o
m o d ify th e c h a rge -
cu r r e nt pro g ra m m ing
re s isto r .
SJ 4 c a n b e c le a red
to re m o ve th e
pu ll-up re s is to rs fr o m
SD A a n d S C L .
(N O T E: G PIO 2 _ m us t _ b e p u ll e d
high t o r u n .)
Si7 0 2 1 I2 C A d d re s s : 0 x 4 0
SJ 3 c a n b e c u t
to av o id po w e rin g
a W S 2 8 1 2 s trin g
w ith V C C . I n c a s e
a h ig h e r-p o w e r
so u rce is req u ire d .
V_ A D C = V_ A D C -IN * 1 0 / 3 2
V_ A D C-IN = V_ A D C * 3 2 /1 0
e.g.: 3 .3V in : 1 .0 3 o u t
60 0 m A o u t
6V m ax in
E S P 82 66
VC C
10 uF 0.1 u F
G N D
G N D
26 M H z
G N D G N D
D N P D N P
5.6 p F
G N D G N D
10 K
VC C
10 K
VC C
VC C
G N D
VC C
G N D
W 2 5 Q 3 2 F V S S
AN T E N N A T R A C E
G N D
10 pF10 pF
12 k
20 0
0.1 u F
10 K
G N D
0.1 u F
G N DG N D
0.1 u F
FT 2 3 1 X S -U
27
27
47 pF47 pF
G N DG N D
0.1 u F
G N DG N DG N DG N D
50 0m A
10 K
VC C
M M B T 22 22 A
M M B T 22 22 A
10 K
10 K
4.7 u F
W S 2 8 1 2
4.7 K
4.7 K
0.1 u F
VC C
G N D
0.1 u F
VC C
G N D
G N D
VC C
G N D
VC C
LM V 3 58
LM V 3 58
22 K10 K
G N D
0.1 u F
VC C
G N D
G N D
VC C
G N D
B L U E
33 0
G N D
G N D
VC C
1.0 u F 2.2 u F
G N DG N D
M C P7 38 3 1
G N D
G N D
G N D
4.7 u F
B A T 2 0 J
10 K
G N D
VI N
LiP o
G N D
Y e llo w
1K
AP 2 1 1 2 K -3 .3 V
2.5 A /3 0V
1K
G N D
R E D
2.0 k
PW RLE D
D N P
G N D
VC C
VI N
V_ U S B
W S 2 8 1 2 -V C C
G N D
VC C
V_ U S B
VC C
V_ B A T T
V_ B A T T
4.7 u F
V_ U S B
G N D
VC C
G N D
VC C
G N D
VD D A
1
LN A
2
VD D 3 P 3
3
VD D 3 P 3
4
VD D _ R T C
5
TO U T /A D C
6
CH IP_ E N
7
XP D _ D C D C /G P IO 1 6
8
M T M S / S PIC L K / G P I O 1 4
9
M T D I / S P I Q /G PIO 12
10
VD D P S T
11
M T C K /S P ID / G P I O 1 3
12
M T D O / S PIC S /G P IO 15
13
G P IO 2
14
SP I C S 2 /G P IO 0
15
G P IO 4
16
VD D P S T
17
SP I H D /SD _ D A T A_ 2
18
SP I W P/ S D _ D A T A _ 3
19
SP I C S 0 /S D _ C M D
20
SP I C L K /SD _ C LK
21
SP I Q /S D _ D A TA _ 0
22
SP I D /S D _ D A T A _ 1
23
G P IO 5
24
U 0 R X D
25
U 0 T X D
26
XT A L _ O U T
27
XT A L _ IN
28
VD D D
29
VD D A
30
R E S 1 2K
31
EX T _ R S T B
32
G N D
EP
U 2
C1 C2
Y 1
L1 L2
C8
R 1 0
R 8
CS
1
H O L D (D 3 )
7
W P ( D 2 )
3
G N D
4
SC K
6
SI( D 0 )
5
SO (D 1)
2
VC C
8
U 5
E 1
C3C4
R 1
R 9
C1 7
R 2 0
C1 1
C1 4
VC C
15
VC C IO
3
3V 3 O U T
13
U S B D M
12
U S B D P
11
R E S E T
14
G N D
6
G N D
16
TX D
20
CB U S 3
19
CB U S 2
10
CB U S 1
17
CB U S 0
18
R I
5
D C D
8
D S R
7
D T R
1
CT S
9
R T S
2
R X D
4
U 4
R 1 3
R 1 4
C1 3C1 2
C1 6
F1
JP 1 5
SH IE LD
R 1 9
Q 2
Q 3
R 1 7
R 1 8
C1 5
JP 1 6
JP 1 8
JP 2 2
JP 2 4
JP 1 2
JP 2 0
JP 4
JP 6
VD D
1
D O U T
2
VS S
3
D I N
4
D 4
1
2
3
JP 1 4
U 6
SI 7 0 2 1
SC K
D A TA
G N D
VD D
R 1 5
R 1 6
C1 8
C9
IC 1 A
3
2
1
84
IC 1 B
5
6
7
R 3R 4
C5
S1
JP 1 3
JP 2 1
JP 5
JP 7
JP 2 5
JP 2 3
JP 1 9
JP 1 7
D 3
R 1 1
C7 C 1 0
U 1
VIN
4
ST A T
1
VB A T
3
PR O G
5
VS S
2
C6
D 2
R 7
JP 1
1
2
D 1
R 2
U 3
IN
G N D
O U T
EN
B P
Q 1
R 1 2
D 5
R 6
SJ 2
JP 2 8
R 5
JP 1 0
JP 1 1
JP 8
JP 9
SJ 1
JP 2 6
JP 2 7
JP 2
JP 3
SJ 4
SJ 3
JP 3 0
1
2
3
4
C1 9
JP 2 9
1
2
3
4
U 0 R X I
U 0 R X I
U 0 R X I
U 0 T X O
U 0 T X O
U 0 T X O
R E S E T
R E S E T
R E S E T
D T R
D T R
A D C
A D C
G P I O 5
G P I O 5
S D _ W P
S D _ W P
S D _ H D
S D _ H D
S D _ S I
S D _ S I
S D _ S O
S D _ S O
S D _ C LK
S D _ C LKS D _ C S0
S D _ C S0
G P I O 1 6
G P I O 1 6
G P I O 1 5
G P I O 1 5
G P I O 1 5
G P I O 1 3
G P I O 1 3
G P I O 1 2
G P I O 1 2
D -
D +
3.3 V _ F
R T S
R T S
S H I E L D
2/S DA
2/S DA
2/S DA
2/S DA
14 /S C L
14 /S C L
14 /S C L14 /S C L
0/B U T T O N
0/B U T T O N
0/B U T T O N
0/B U T T O N
0/B U T T O N
A D C -I N
A D C -I N
4/W S28 1 2
4/W S28 1 2
ES P 8 2 6 6E X
FT 2 31 X S (U S B -to -S eria l C o n v erter)
A u to -R e se t R u n D e fa u lt P u ll-U p s
Jim Lin d b lo m
v1 0
32 M b it (4M B ) Fla s hO utp u t H e a d e rs
3.3 V-1 V A D C S ca lin g W S28 1 2 L ED a n d O u tp u t A c tiv e-Lo w Bu tto n - G P IO 0
Si7 0 21 T e m p e ra tu re a n d H um id ity Se n so r
& I2 C H ea d e r
Vo ltag e R e g ula tor an d B attery C ha rg e r Lith iu m -P o lym e r B a tte ry C h a rg e r (1 -c e ll)
Po w er L ED
R e le a se d u n d e r th e C re a tiv e C o m m o ns
A ttrib u tio n Sh a re -A like 4 .0 L ice n se
http s ://c re at iv e co m m o n s.o rg /lic e n s e s /b y-s a /4 .0/
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