2 layers28 × 37.5 mm
2 layers44.7 × 93 mm
ESP 01 MQTT
rapola/RP_ZisternensensorWasser-Füllstandsensor für Zisternen
- Size
- 44.7 × 93 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 34
- Nets
- 39
- Pads
- 114
- Tracks, vias
- 265, 21
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 1 Nov 2024
- Updated
- 11 Jun 2025
Overview
ESP 01 MQTT is an open-source printed circuit board by rapola, from the rapola/RP_Zisternensensor repository on GitHub. It is a 2-layer board of 44.7 × 93 mm with 34 parts on 39 nets, routed with 265 tracks and 21 vias.
It is built around the ATMEGA8-16PC, BC817 and LL101A-GS08. Its parts include 9 resistors, 8 connectors, 5 capacitors, 4 diodes and 3 ICs. It belongs with the home automation and IoT boards and the ESP8266 and AVR (ATmega, ATtiny) boards of this library.
Main components
3
ATMEGA8-16PC
PDIP-280℃~+70℃ 10bit 16MHz 1KB 23 4.5V~5.5V 512Byte 8 Bit 8KB AVR Built-in FLASH PDIP-28 Microcontrollers (MCU/MPU/SOC)Microchip TechnologyMicrocontrollers (MCU/MPU/SOC)
BC817
SOT-231 NPN 100nA 150MHz 300mW 40 45V 500mA 5V 700mV NPN SOT-23 Bipolar (BJT) ROHSShikuesBipolar (BJT)
LL101A-GS08
MiniMELF1 Independent 200nA@50V 2A 30mA 410mV@1mA 60V MiniMELF Schottky Diodes ROHSVishay IntertechnologySchottky Diodes
README
README.mdRP_Zisternensensor
Wasser-Füllstandsensor für Zisternen
-
Hauptplatine für Auswertung und MQTT Sender
-
Level Sensor:
Schematic
Parts
34| Qty | Value | Footprint | References |
|---|---|---|---|
| 5 | 1k | Resistor_SMD:R_0805_2012Metric | R1, R2, R3, R4, R6 |
| 5 | Conn_01x01 | RP_Footprints_01:Wago236-743_RM5 | J1, J2, J3, J4, J5 |
| 2 | 1N4007 | Diode_THT:D_DO-41_SOD81_P10.16mm_Horizontal | D1, D2 |
| 2 | 22n | Capacitor_SMD:C_0805_2012Metric | C4, C5 |
| 2 | 2k2 | Resistor_SMD:R_0805_2012Metric | R5, R9 |
| 2 | C_Polarized | Capacitor_THT:CP_Radial_D5.0mm_P2.00mm | C1, C2 |
| 1 | 100n | Capacitor_SMD:C_0805_2012Metric | C3 |
| 1 | 10k | Resistor_SMD:R_0805_2012Metric | R7 |
| 1 | 3k3 | Resistor_SMD:R_0805_2012Metric | R8 |
| 1 | ATmega8-16P | Package_DIP:DIP-28_W7.62mm | U3 |
| 1 | BC817 | Package_TO_SOT_SMD:SOT-23 | Q1 |
| 1 | Conn_01x01_Pin | Connector_PinHeader_2.54mm:PinHeader_1x01_P2.54mm_Vertical | J6 |
| 1 | Conn_01x05 | Connector_PinHeader_2.54mm:PinHeader_1x05_P2.54mm_Vertical | J8 |
| 1 | Conn_01x06 | Connector_Molex:Molex_PicoBlade_53398-0671_1x06-1MP_P1.25mm_Vertical | J7 |
| 1 | Crystal | Crystal:Crystal_HC49-4H_Vertical | Y1 |
| 1 | ESP-01v090 | ESP8266:ESP-01 | U1 |
| 1 | IRLML9301 | Package_TO_SOT_SMD:SOT-23 | Q2 |
| 1 | LED | LED_SMD:LED_0805_2012Metric | D3 |
| 1 | LL101A-GS08 | Diode_SMD:D_MiniMELF | D4 |
| 1 | LM2596-StepDownModul | RP_Footprints_01:YAAJ_DCDC_StepDown_LM2596_noSilk | M1 |
| 1 | LOGO | RP_Logos:RP_12x4 | G*** |
| 1 | NCP1117-3.3_SOT223 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U2 |
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Questions
How big is the ESP 01 MQTT PCB?
It measures 44.7 × 93 mm and has 2 copper layers, 1.6 mm thick.
What parts does the ESP 01 MQTT use?
34 parts, built around the ATMEGA8-16PC, BC817 and LL101A-GS08. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the ESP 01 MQTT KiCad files?
From the rapola/RP_Zisternensensor repository on GitHub, at the commit this page was made from: the board is ESP_01_MQTT/ESP_01_MQTT.kicad_pcb and its schematic ESP_01_MQTT/ESP_01_MQTT.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the ESP 01 MQTT design in my own project?
Its repository states no licence, so its author keeps all rights: ask rapola before reusing the design.