IFREEQ ZMAi 90

• Device
  • Description
  • Configuration
  • Flash Parameters
  • Pins
  • Ports
• Installation
• Next Steps

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Device

Description

ZMAi-90, also known as WDS688, is a single-phase DIN rail smart power meter.

By default, it runs Tuya proprietary firmware.

Configuration

Provisioning configuration name: espqtoggle/ifreeq/zmai-90

Flash Parameters

• flash mode: DIO
• flash frequency: 40MHz

Pins

1st Generation

Number	Function	Remarks
1	V9821 RX
3	V9821 TX
4	status LED	active low
12	latching relay	active high
13	push button	active low

Ports

Id	Type	Description	Range/Unit	Remarks
push_button	boolean	on/off button, setup button
relay	boolean	relay
active_power	number	active power	W
reactive_power	number	reactive power	VAR
apparent_power	number	apparent power	VA
power_factor	number	power factor	0..100 %
energy	number	energy	Wh
voltage	number	voltage	V
current	number	current	A
frequency	number	frequency	Hz

2nd Generation

Number	Function	Remarks
1	MCU RX
3	MCU TX

Ports

Id	Type	Description	Range/Unit	Remarks
relay	boolean	relay
active_power	number	active power	W
reactive_power	number	reactive power	VAR
apparent_power	number	apparent power	VA
power_factor	number	power factor	0..100 %
energy	number	energy	kWh
voltage	number	voltage	V
current	number	current	mA

Installation

Follow the Tuya Convert OS procedure.

Next Steps

You can now power your device by connecting it to mains. Follow the initial setup instructions to connect the device to Wi-Fi and add it to your qToggle system.