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Esp8266-temperature humidity

amadeuspzs·esp8266-temperature-humidity·hardware/esp12f-si7021/esp12f-si7021-v1.3.kicad_pcb

Esp8266-temperature humidity PCB layout, top view — open source ESP8266 board by amadeuspzs

About the Esp8266-temperature humidity PCB

Esp8266-temperature humidity is an open source ESP8266 PCB design by amadeuspzs, published on GitHub. It is a 2-layer board measuring 49.9 × 34 mm, with 23 components from 16 distinct parts.

Its main chip is the ESP-12F, from the ESP8266 family. Other key parts include the MCP1700-3302E_SOT23 and SI7021-A20. By type, the board carries 9 resistors, 6 capacitors, 4 connectors, 3 ICs and 1 transistor.

It belongs with the sensors, iot & wireless and power & battery designs in this gallery, and the repository also holds 1 earlier revision of it.

From the project

Low power MQTT temperature and humidity sensor

Goal: run for 6 months+ using a battery.

Device|Min voltage (V)|Stated voltage (V)|Max voltage (V) ---|---|---|--- ESP-12F|3.0|3.3|3.6 Li-Ion Cell|2.8|3.7|4.2 2 X AA Alkaline|2.8|3|3.3

1. Regulate the Li-Ion voltage to 3.3V using e.g. MCP1700 2. Run off alkaline batteries without regulator (unsustainable as not rechargeable)

Battery|Cost (£)|Capacity (mAh)|Unit Cost (p/mAh)|Connector ---|---|---|---|--- BL-5C|4.49|1500|0.30|None MakerFocus|3.49|1000|0.35|JST GH 1.25 Generic|4.75|1800|0.26|JST RCY (BEC) Generic|2.59|1200|0.22|JST PH 3pin Generic|2.00|1200|0.17|JST GH 1.25mm 2 pin…

Esp8266-temperature humidity, from the project README
From the project README

Main components on the Esp8266-temperature humidity

MCP1700-3302E_SOT23ESP-12FSI7021-A20

Esp8266-temperature humidity bill of materials (BOM)

23 components, 16 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
MCP1700-3302E_SOT23
U1
1
ESP-12F
U2
1
SI7021-A20
Si7021-A20
U3
1
BSS84
Q1
1
JST PH3
J1
1
ESP_01x06_Female
J2
1
JST PH2
J3
1
JST GH2
J4
2
1UF
1uF
C1, C2
2
0.1UF
0.1uF
C3, C5
1
10UF
10uF
C4
1
0.01uF
C6
1
330K
11.5K
R1
1
100K
3.57K
R2
6
10K
R3, R4, R5, R6, R7, R8
1
1K
R9

Esp8266-temperature humidity design files

The KiCad project lives in the amadeuspzs/esp8266-temperature-humidity repository on GitHub; these links point at the commit this page was built from.

Esp8266-temperature humidity: common questions

What microcontroller does the Esp8266-temperature humidity use?

The Esp8266-temperature humidity is built around the ESP-12F, from the ESP8266 family.

How big is the Esp8266-temperature humidity PCB?

The Esp8266-temperature humidity measures 49.9 × 34 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Esp8266-temperature humidity?

23 components, from 16 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 Esp8266-temperature humidity design files?

From the amadeuspzs/esp8266-temperature-humidity repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the Esp8266-temperature humidity design in my own project?

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

Can I test firmware for the Esp8266-temperature humidity without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP8266 firmware against it before you order a PCB.

Earlier revisions in the repo: esp12f-si7021-v1.2

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