Tuya Smart Switches with Integrated 433MHz RF Remote Control – Models, Brands, Forum Threads

User question

I want to find forum topics related to tuya smart switch/relay devices that integrates the ability to control their relays with 433mhz remotes

Artificial Intelligence Response

Direct answer to the question

• Below is a curated list of active forum threads that specifically deal with Tuya-based smart switches / relay boards that have a built-in 433 MHz RF receiver (i.e. they can be driven directly from an RF handheld remote as well as from Wi-Fi / app).
• Each entry shows the forum, topic title, short context, and the chipset or board under discussion so you can quickly decide whether it matches your hardware.

#	Forum & Topic	Focus (device / chipset)	Why it is useful
1	Elektroda – “Configuring RF Function on [CB3S] Tuya 2CH Smart Switch” https://www.elektroda.com/rtvforum/topic4032348.html	2-relay module, TYWE3S → CB3S (BK7231N), on-board 433 MHz	Step-by-step pairing procedure, pinout, OpenBK/Tasmota templates
2	Elektroda – “Using 433 MHz RF Receiver with OpenBK on Smart Switch 4 CH TYWB…” https://www.elektroda.com/rtvforum/topic3989878.html	4-relay garage-door board, BK7231T/BK7231N, CB3S	How to capture RF codes, configure OpenBeken, solve range issues
3	Elektroda – “[Solved] Tasmota with 433 MHz RF switch – how to synchronise” https://www.elektroda.com/rtvforum/topic4040517.html	Zigbee+RF Tuya relay, ESP8266	RF pairing + Tasmota “RfReceived” → MQTT/state-sync tricks
4	Elektroda – “Teardown Tuya RSH Smart IR02 WiFi RF+IR Universal Remote” https://www.elektroda.com/rtvforum/topic4004522.html	Tuya SH4 RF module @ 433 / 315 MHz	Hardware photos, firmware dump, compatible protocols
5	Elektroda – “Avatto Tuya S16 PRO Wi-Fi + RF Teardown” https://www.elektroda.com/rtvforum/topic4075585.html	Avatto S16-PRO (CBU module + SH4 RF)	Shows UART pads, RF IC identity, how to flash
6	Elektroda – “How to Connect Tuya Smart Wi-Fi + RF Curtain Switch…” https://www.elektroda.com/rtvforum/topic3884960.html	Curtain switch, TYWE3S + 433 MHz	Wiring diagrams, pairing method, safety tips
7	Elektroda – “Using an RF controller to control channels” https://www.elektroda.com/rtvforum/topic3970343.html	Generic Tuya board flashed with OpenBeken	Multi-channel RF controllers, signal learning
8	Elektroda – “Configuring Tuya eWeLink WiFi 4CH RF Smart Switch Module TYEB…” https://www.elektroda.com/rtvforum/topic3974458.html	TYEB04, CB3S, 4-relay + 433 MHz	GUI vs AT-commands for RF, reset button behaviour
9	Homey Community – “Tuya fan with 433 MHz” https://community.homey.app/t/tuya-fan-with-433mhz/133498	Ceiling-fan controller, RF + Wi-Fi	Capturing codes, bridging to Homey, pitfalls
10	Tuya OEM Support – Tag “rf-433mhz” https://support.tuyaoem.com/tags/rf-433mhz/	Mixed devices	Official QA, pairing limits, firmware versions

(Threads 1–8 are in Polish but auto-translate accurately with browser tools; they usually contain oscilloscope shots, GPIO lists and pre-made Tasmota/OpenBeken templates.)

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Detailed problem analysis

1. Typical hardware blocks
   • MCU/Wi-Fi SoC: TYWE3S (ESP8266), WB2S/BK7231T, CB3S/BK7231N
   • RF front-end: Super-regen receivers such as SYN470R, RXB6, or Tuya’s SH4 module
   • Relay driver: 1 → 4 channels, often SRA-05VDC-SL-C or similar
   • Supply: low-cost capacitive SMPS; RF performance is sensitive to its noise

2. Control paths
   a) Cloud/App → Wi-Fi → Relay (standard Tuya firmware)
   b) 433 MHz Remote → RF RX → MCU GPIO interrupt → Relay (local, no cloud)

3. What the forums mainly solve
   • Mapping the RF receiver DATA pin to the correct GPIO so custom firmware (Tasmota, ESPHome, OpenBeken) can read it.
   • Learning / decoding fixed-code protocols (EV1527/PT2262). Rolling-code remotes are almost never supported.
   • Keeping Wi-Fi and RF actions in sync (state feedback) using MQTT or internal rules.
   • Extending range: quarter-wave wire (~17.3 cm) or SMA whip, ground-plane tweaks.
   • Flashing obstacles: new Tuya bootloaders block tuya-convert; UART flashing via 3.3 V serial is the fallback.

4. Integrated RF vs RF-bridge
   The posts explicitly cover integrated RF receivers (the relay module itself “hears” the remote). If you only have Wi-Fi hardware, you need an external 433 MHz bridge (Sonoff RF Bridge, CC1101 USB dongle, etc.), which is a separate topic.

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Current information and trends

• Shift from ESP8266 to Beken BK7231N/T (CB3S, WB3S) on new Tuya boards; community firmware “OpenBeken” (a.k.a. OpenBK/OpenBK7231) now adds RF decoding similar to Tasmota.
• Tasmota 12.x and newer keeps adding RfRaw pattern matcher; many templates for Tuya RF boards are maintained on Blakadder’s database.
• Mass-market RF+Wi-Fi combo switches (Moes, Avatto, Zemismart) continue to appear on AliExpress; most still use fixed-code 433 MHz.
• Matter/Thread does not yet carry 433 MHz; hybrid RF+Matter devices are not on roadmap (2024).

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Supporting explanations and details

• 433 MHz ≈ 433.92 MHz ISM band; legal in EU/US for short-range devices if radiated power ≤ 10 mW ERP (typical Tuya remote is < 5 mW).
• Fixed-code protocol basics: a 24-bit or 32-bit frame, OOK (On-Off Keying). Decoder libraries (RCSwitch, DecodeOOK) used in Tasmota/ESPHome/OpenBeken.
• GPIO mapping example (from Thread #1):

 Rf receiver DATA → MCU GPIO14
Relay1 → GPIO12
Relay2 → GPIO5
LED → GPIO13

Tasmota template string:

 {"NAME":"CB3S-2CH-RF","GPIO":[0,0,0,0,56,21,0,0,17,255,18,0,0],"FLAG":0,"BASE":18}

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Ethical and legal aspects

• Flashing community firmware voids warranty and may violate vendor EULA.
• Observe national EMC & RF power regulations.
• Rolling-code duplication (e.g. garage doors) can be illegal; stick to fixed-code remotes that ship with the switch.
• Ensure safe isolation when working on mains-powered modules; follow IEC 60335 / UL 60730 where applicable.

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Practical guidelines

1. Identify your board (model number, SoC label) before following a template.
2. Use the forum links above to get exact GPIO maps; do not rely on guesswork.
3. If tuya-convert fails, solder to TX/RX/GND/3V3/GPIO0 pads and use 115 200 baud for flashing.
4. After custom firmware is running:
   a) Enable RF receive component (Tasmota SwitchTopic 1, RfRaw 0)
   b) Press each remote button → note hexadecimal code
   c) Create Rule or ESPHome on_rc_switch trigger to toggle the desired relay.
5. For poor range, add a 17 cm insulated wire to RF module ANT pad, routed away from metal.

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Possible disclaimers or additional notes

• Newer Tuya firmware (post-mid-2022) often encrypts MCU ↔ RF serial comms; community support may lag.
• Some combo devices share a single antenna trace for Wi-Fi & 433 MHz; modifications can detune Wi-Fi – test both paths.

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Suggestions for further research

• Follow OpenBeken GitHub issues for BK7231 + RF improvements.
• Look at rtl_433 / cc1101 + MQTT bridges if you need bidirectional RF or rolling code support.
• Monitor Home Assistant “Tuya Local” integration roadmap in case native RF-event reporting gets added.

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Brief summary

The most active technical discussions on Tuya switches/relays with integrated 433 MHz receivers are currently on Elektroda (Polish electronics forum) and, to a lesser extent, the Homey and Tuya OEM communities. Threads listed in the table provide concrete templates, flashing logs, and RF-pairing advice for devices based on both ESP8266 and the newer BK7231N/T chips. Start with a teardown or exact model identification, pick the matching thread, and apply its GPIO map and firmware template; you will then be able to pair any fixed-code 433 MHz remote to control the on-board relays locally while still retaining Wi-Fi/Home-Automation integration.

Disclaimer: The responses provided by artificial intelligence (language model) may be inaccurate and misleading. Elektroda is not responsible for the accuracy, reliability, or completeness of the presented information. All responses should be verified by the user.