HardLabs

Sapphire Captain

gregdavill·daikin-esp·pcb/sapphire-captain/kicad-src/sapphire-captain.kicad_pcb

Sapphire Captain PCB layout, top view — open source ESP32 board by gregdavill
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About the Sapphire Captain PCB

Sapphire Captain is an open source ESP32 PCB design by gregdavill, published on GitHub. It is a 4-layer board measuring 50 × 31 mm, with 68 components from 41 distinct parts.

Its main chip is the MAX22088, from the ESP32 family. Other key parts include the MT2492, TLV62569DRLR and XL1192S. By type, the board carries 25 resistors, 19 capacitors, 8 diodes, 4 ICs, 4 inductors and 3 connectors.

It belongs with the iot & wireless designs in this gallery.

From the project

ESP32-C3 hardware to connect to a Daikin ducted A/C system. enabling WiFi control in Home Assistant.

Wireless A/C Controller, an ESP32-C3 based hardware module to connect to a Daikin ducted A/C system and enable WiFi control in Home Assistant.

The PCB repo contains a few different designs: - saphire-captain : Initial ESP32 + XL1192 board. Power extraction from the bus and transmission didn't work well. - hb-bob-r0.1 : Breakout board designed for the MAX22088 homebus transceiver. This board enabled rx/tx and power from the P1P2 bus. - esp-daikin-r1.0 : Basic ESP32-C3 board with DCDC, dosigned to attach directly to the hb-bob board.

Main components on the Sapphire Captain

MT2492TLV62569DRLRXL1192SMAX22088

Sapphire Captain bill of materials (BOM)

68 components, 41 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
MT2492
U1
1
TLV62569DRLR
TLV62569DRL
U2
1
XL1192S
XL1192
U3
1
MAX22088
ESP32-C3-MINI-1
U4
2
2N7002
Q1, Q2
1
2604-1102
Conn_01x02
J1
1
USB_C_Receptacle_USB2.0
J2
1
C8387
JTAG/SW Interface
J3
2
JFC0402-0250FS
100mA
F1, F2
1
PTS810SJK250SMTRLFS
SW_DIP_x01
SW1
1
BZT52H-C16,115
16V
D1
4
1N5819W
D_Filled
D2, D3, D4, D5
2
BZT52H-B5V6,115
5.6V
D6, D7
1
5.6V
LED_ARGB
D8
2
PBY100505T-101Y-N
220R
FB1, FB2
1
UT252010N-2R2M
2.2uH
L1
1
YNR3015-100M
10uH
L2
7
CL05B104KO5NNNC
0.1uF
C2, C4, C13, C16, C18, C19, C20
1
CL31A226KAHNNNE
22uF
C3
2
CL10A106KP8NNNC
10uF
C5, C6
Show 21 more
QtyPartRefs
3
CL05B223KB5VPNC
22nF
C7, C8, C9
1
CC0402CRNPO9BN6R8
6.8pF
C10
1
CC0603KRX5R5BB106
10uF
C11
1
CL05B471KB5NNNC
470p
C12
1
CC0402KRX5R6BB105
1uF
C14
1
RVT1V470M0605
47uF
C15
1
CL21A226MAYNNNE
22uF
C17
1
RC2010JK-0730RL
30R
R1
2
RC0402FR-071K5L
1.5k
R2, R3
2
RC0402FR-0722KL
22k
R4, R17
1
RC0402FR-07115KL
115k
R5
1
RC0402FR-0725K5L
25.5k
R6
1
RC0402FR-07100KL
100k
R7
2
RC0402FR-0775KL
75k
R8, R9
2
RC0805FR-071RL
1R
R10, R11
1
20K
DNP
R12
1
RC0402FR-070RL
0R
R13
5
RC0402FR-0710KL
10k
R14, R15, R16, R18, R21
1
RC0402FR-074K7L
4.7k
R19
3
RC0402FR-07470RL
470R
R20, R22, R23
2
RC0402FR-075K1L
5.1K
R24, R25

Sapphire Captain design files

The KiCad project lives in the gregdavill/daikin-esp repository on GitHub; these links point at the commit this page was built from.

Sapphire Captain: common questions

What microcontroller does the Sapphire Captain use?

The Sapphire Captain is built around the MAX22088, from the ESP32 family.

How big is the Sapphire Captain PCB?

The Sapphire Captain measures 50 × 31 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Sapphire Captain?

68 components, from 41 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the Sapphire Captain design files?

From the gregdavill/daikin-esp repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the Sapphire Captain design in my own project?

The repository has no license, so all rights stay with gregdavill. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Sapphire Captain without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP32 firmware against it before you order a PCB.

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