Sensor Gateway

WiFi Configuration

SSID:

Password:

WiFi Mode: Normal (connects to STA; GPIO 0 hold opens AP for 10 min) Permanent AP (always access point)

AP Password:

Use DHCP:

MQTT Configuration

MQTT Enabled:

Server:

Port:

User:

Password:

Root Topic:

Interval (s):

Hardware Interfaces

I2C Bus

I2C Module fitted:

ADS1115 (I2C 4-ch ADC)

Requires I2C bus enabled above.

Enable:

Reading: --

Onboard ADC1

ESP32 ADC1 pins — 12-bit, 0–3.3 V. ADC2 unavailable while WiFi is active.

Pin	Enable	Name	Type	R1 (kΩ)	R2 (kΩ)	Shunt (Ω)	PSI Max	Tank (cm)	Cal (+PSI)	Atten	Reading

ADC Attenuation Calibration

Calibration offsets applied to raw mV readings at each attenuation level. Values are the same for all ADC channels.

Attenuation	Range	Cal (mV)	Current Reading

CAN Bus

Enable:

Baud Rate:

TX Pin (GPIO):

RX Pin (GPIO):

SE Pin (Standby Enable): Enable

Status: --

Modbus RTU (RS485)

Enable:

Baud Rate:

Slave ID:

Register:

Status: -- Value: --

GPS (TinyGPS++)

Enable:

Serial Port:

Baud Rate:

RX Pin:

TX Pin:

Status: -- Satellites: --

PCF857x I2C GPIO Expander

Enable:

DS3231 RTC

Enable:

I2C Address:

Sensors

I2C bus enable and pin selection are configured in the Hardware tab.

DHT Sensor (Temperature/Humidity)

Reading: --

SHT21 (I2C Temp/Hum)

Reading: --

Onboard ADC1 configuration has moved to the Hardware tab.

DS18B20 Temperature

Enable:

Pin:

Status: -- Temperature: --

INA226/INA219 Power Monitor

Enable:

I2C Address:

Status: --

RCWL-1670 — Ultrasonic distance / level

Enable:

Trigger Mode: (external = echo-only)

Trig Pin:

Echo Pin:

Mode:

Tank Height (cm):

Reading: --

CAN Bus Configuration

Mode: CAN Sender CAN Bridge

ESP32 responds to J1939 queries on configured PGNs. Query rate is set by the ObjC client.

Device SA (hex):

Broadcast (push data): Uncheck to use query-response only

Broadcast interval: seconds (1–60)

PGN	Sensor	GPIO	Enable	Config

Detection & Counters

Pin priority: I2C → Sensors → DHT → Motion → I/O Ports.
GPIO0/2/15 excluded from detection (boot constraints). GPIO34-39 are input-only.

Simple Motion Detector

Motion Input 1

Enable:

IN Pin:

Motion: --

Motion Input 2

Enable:

IN Pin:

Motion: --

Reed Relay Inputs

Reed Relay 1

Enable:

Pin:

Debounce (ms):

State: --

Reed Relay 2

Enable:

Pin:

Debounce (ms):

State: --

Pulse Counter

Enable:

Pin:

Mode:

Reading: --

Hour Meter

Enable:

Source:

Pin:

Active LOW: Count time when pin is LOW

Start from (h):

Reading: --

Energy Meter

Enable:

Pin:

Pulses / kWh:

Start from (kWh):

Reading: --

RPM Meter

Enable:

Pin:

Reading: --

Digital I/O Ports

Only pins not claimed by I2C or detection sensors are shown. Enabling I2C or detection removes affected pins on next page load.

GPIO	Enable	Name	Dir	Function / Mode	Inverse	State / Control

Automation Rules

Automate DOUT/PWM outputs based on sensor readings. Same source+condition pair cannot be duplicated.

Add New Rule

Sensor Source:

Condition:

Action:

Output Port:

Enabled:

System Information

Time & NTP

Timezone:

NTP Server 1:

NTP Server 2:

Web UI Access

Password:

Device License

Device MAC:--

Sensor Gateway ESP32

WiFi Configuration

MQTT Configuration

Hardware Interfaces

I2C Bus

ADS1115 (I2C 4-ch ADC)

ADS1115 Channel Configuration

Onboard ADC1

ADC Attenuation Calibration

CAN Bus

Modbus RTU (RS485)

GPS (TinyGPS++)

PCF857x I2C GPIO Expander

DS3231 RTC

Sensors

DS18B20 Temperature

INA226/INA219 Power Monitor

RCWL-1670 — Ultrasonic distance / level

CAN Bus Configuration

Detection & Counters

Simple Motion Detector

Reed Relay Inputs

Pulse Counter

Hour Meter

Energy Meter

RPM Meter

Digital I/O Ports

▼ I2C Expander Ports

Automation Rules

Add New Rule

System Information

Time & NTP

Web UI Access

Device License