Availability
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| West coast: | -4 |
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A Smart 4-Channel Relay/Switch
With Tasmota-Plus installed, this WiFi-connected smart relay supports remote control (On/Off) for each relay independently.
Description
Common Smart devices are designed to only work via the manufacturer’s server and with special apps; the user never communicates directly with the device.
While this works well for home users, power users might prefer to be able to directly control the device using a simple http:// (web) interface.
Tasmota gives direct access to the device via simple http:// web access. The benefit of this for power users is that the device can be controlled using:
- Web UI interface, or
- http:// Command Interface. Ideal for control by external scripts.
This product is pre-loaded with Tasmota-Plus which adds these features to standard Tasmota:
 | Ping Watchdog:
Cycle specified Relay if Pings to a specified IP address fail
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 | WAN Security:
Prevent commands being executed unless coming from a nominated IP address.
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 | WiFi Signal Indicator:
Visualisation of the WiFi signal strength as seen by the Tasmota device.
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 | Clock Page:
Allowing setting of parameters (Time zone, Daylight saving, …) so that the Real Time Clock is accurate.
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Applications
- Smart switching: Local or Remote. The 4 relays are independently controllable.
- Ideal for solar-power installations (DC powered, low power) including on rural properties.
- Internal script control, with various triggers; e.g. time, external commands, ...
- External script control, with e.g. PHP, Linux shell scripts, Windows batch scripts, ....
- Where reliance on 3rd party servers is a concern.
Features
- WiFi network connection. (required).
- Fast, internal web server.
- Control via:
- Blocking of external (WAN) requests unless from permitted IP address.
- No special apps required.
- No 3rd party server required.
- Clock. Set using NTP. Adjusted for Daylight savings.
- Powerful internal scripting language: Rules
- Timers. On/Off triggered:
- at set times,
- relative to Sunrise,
- relative to Sunset, or
- by rules.
Powering from Passive 24V PoE
As this device can be powered by 24V DC, a 24V PoE supply can be used as follows.
Prepare a LAN cable with a normal RJ-45 connector on one end, and connect the other end to the device as below:
- Pins 4,5: (+) DC
- Pins 7,8: (-) DC
- Pins 1,2,3,5: No connection
Need a 24V PoE-powered AP?
A solar, or remote, installation may need a simple WiFi AP close by to connect this device to the LAN. In the Related Products section (below) there are a number of 24V, low-power APs that are ideal.
Specifications
| Power supply | 9 to 24 VDC, or
100 to 240 VAC
Power supply not included.
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| Power consumption | All relays on: 3.0 W
All relays off: 0.2 W
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| Relay type | Single-Pole, Double Throw (SPDT).
Common/Normally Open/Normally Closed
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| Relay current | 10 A per relay (max.)
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| Relay voltage | 240 V (max.)
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| Power load | 2400 W (per relay, non-reactive, max.)
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| Mounting | DIN Rail, or
Screws
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| WiFi standards | 802.11b/g/n. 2.4 GHz only.
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| Manufacturer’s warranty | 1 year
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| Hardware manufacturer | Sonoff
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| Manufacturer’s model | 4CHProR3
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| Firmware | Tasmota-Plus, customised
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| Works with http:// | Yes
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| Works with alexa | No
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| Works with Google Assistant | No
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