No Alexa. No hub. No voice commands. Just tap and done.
The Problem That Started It All
It's 11:45 PM. I'm in bed, half asleep, and the light is still on.
My options:
- Get up and hit the physical wall switch (feels like climbing Everest at midnight)
- Unlock my phone, swipe past notifications, find the Wipro app, wait for it to load, tap the bulb tile, confirm the action
Neither of these should be this hard in 2026.
I already had a Wipro Wi-Fi smart bulb installed. Great bulb — RGB, tunable white, music sync, the works. But the app-based control was killing the "smart" experience. And I wasn't going to spend ₹3,000-5,000 on an Amazon Echo or Google Nest just to say "Alexa, lights off" before bed.
Then I remembered something I'd seen online: NFC tags.
Small stickers. Programmable. Cost almost nothing. And iPhones can read them without even unlocking.
What if I just... stuck one next to my bed and tapped my phone on it?
Spoiler: It worked. Here's exactly how I built it, what I learned, and how you can replicate it in an afternoon.
What Even Is NFC? (Bear With Me, This Is the Fun Part)
Before we get into the setup, let me geek out for a moment — because understanding why this works makes the whole thing more satisfying.
NFC stands for Near Field Communication. It's a short-range wireless technology that operates at 13.56 MHz and works over a maximum distance of about 4 centimetres. That ridiculously short range is actually a feature — it means you have to deliberately tap your device to trigger it, so false triggers are essentially impossible.
NFC is a subset of the broader RFID (Radio Frequency Identification) family of technologies. You've been using RFID/NFC your whole life without knowing it:
- Your credit/debit card for tap-to-pay? NFC.
- Your Mumbai Metro card? RFID.
- That office access card you wave at the door? Also RFID.
- Apple Pay, Google Pay on your phone? NFC.
The difference between passive NFC tags (like the stickers we're using) and your phone is power. Your phone has a battery and an active NFC controller. The tag has neither — it's completely passive. When your phone comes close, it generates a tiny electromagnetic field, which inductively powers the tag just long enough for it to transmit its stored data back. No battery. No charging. Ever.
The tag I used: NTAG213
This is the most widely deployed consumer NFC chip in the world. Here's what makes it special:
- Memory: 144 bytes of user-accessible storage — enough for a URL, a command, or a short text string
- Standard: ISO 14443 Type A compliant — meaning it works with virtually every NFC-enabled device
- Rewritable: You can reprogram it hundreds of times, so if your setup changes, just overwrite the tag
- iPhone compatibility: iPhone 7 and above can read NFC tags. iPhone 13 (what I use) supports background NFC tag reading — meaning the screen just needs to be on and unlocked, no app needs to be open
One fun fact: the tag has no moving parts, no battery, and theoretically no expiration date. That ₹10 sticker could outlast your phone by a decade.
The Shopping List
I only bought two products for this entire project.
| Product | Price | Link |
|---|---|---|
| Wipro 12.5W B22D Wi-Fi Smart LED Bulb (16M Colours, Music Sync, Voice Control) | ₹704 | Amazon India |
| NTAG213 NFC Tag Stickers, Rewritable — Pack of 10 | ₹169 | Amazon India |
| Total | ₹873 |
Everything else I used was free:
- Wipro Smart Home app (iOS/Android — free)
- Google Home app (iOS/Android — free)
- Google Assistant app (iOS — free)
- Apple Shortcuts (built into every iPhone — free)
💡 Pro tip: The pack of 10 tags is the right call even if you only need 3. You'll find uses for the rest faster than you think — business card tag, desk work mode tag, silent mode trigger. More on that at the end.
The Architecture — How It All Connects
This is the part most blogs skip, and then readers get lost halfway through setup. Let me show you the full picture first.
Why so many layers? Great question. Ideally, the NFC tag would talk directly to the bulb. But Wipro/Tuya doesn't expose native iOS Shortcuts actions, and neither does Google Home. So we build a bridge: iPhone Shortcuts → Google Assistant → Google Home → Bulb. Each layer does one specific job, and together they create a seamless tap-to-control experience.
The whole chain from tap to bulb response takes about 2-3 seconds. Not instant, but completely hands-free.
Physical Setup — Where to Put the Tags
I placed 3 tags in total:
Tag 1 — Near the door (ON only)
Stuck on the wall right next to the light switch. When I enter the room, I tap this to turn the light on — without touching the physical switch.
Tag 2 — Bedside (ON)
Stuck on the headboard or nearby wall. When I'm in bed and want to turn the light on without getting up.
Tag 3 — Bedside (OFF)
Right next to Tag 2. Tap this to turn off before sleeping.
Why two separate tags instead of one toggle?
This is important to understand. NFC tags can only store and send a fixed command. They have no way of knowing the current state of your bulb (is it on or off right now?). A single "toggle" tag would be unpredictable — tap once and it turns off, tap again quickly and it turns on again. Two dedicated tags — one for ON, one for OFF — is far more reliable and predictable.
⚠️ Critical warning: The physical wall switch is the Achilles heel of this entire system. If someone flips the physical rocker switch to OFF, the bulb loses mains power completely. No power = no Wi-Fi = no smart control. The NFC system stops working until the physical switch is turned back ON. I recommend putting a small label on the switch that says "Don't switch off — smart bulb".
Step-by-Step Setup Guide
Step 1 — Set Up the Wipro Bulb
- Screw in the Wipro bulb and turn the physical switch ON
- Download the Wipro Smart Home app (iOS / Android)
- Create an account — note your email and password carefully, you'll need them again
- In the app, tap + → Add Device → Lighting → follow the Wi-Fi pairing instructions
- Make sure your phone is on 2.4 GHz Wi-Fi during setup (the bulb doesn't support 5 GHz)
- Once paired, test on/off from the app to confirm it's working
Step 2 — Link Wipro to Google Home
- Install Google Home app and sign in with your Google account
- Tap + (top right) → Link app or service
- Tap Works with Google
- Search for "Wipro Next Smart Home"
- Tap it → tap Continue → tap Agree and continue
- A Wipro login page opens — change the country from "United States" to "India" first (critical step many miss)
- Enter your Wipro app email and password → tap Next Step
- Your bulb will appear — tap Next to add it to your home
You should now see your bulb in Google Home, showing its live status.
Step 3 — Create Google Home Routines
This is the engine room. We're creating two voice-triggered routines that Google Home will execute when Google Assistant hears a specific word.
Routine 1 — Lights ON:
- Open Google Home → tap Automations (bottom tab)
- Tap + → New Routine
- Under Starters → When I say to my Assistant → type:
Lights - Under Actions → Add action → Control home devices → select your bulb → Turn on
- Tap Save — name it "Lights"
Routine 2 — Lights OFF:
- Repeat the above process
- Starter phrase:
Nights - Action: Select your bulb → Turn off
- Save — name it "Nights"
💡 Why "Lights" and "Nights"? These words are phonetically distinct enough that Google Assistant won't confuse them with each other or with random speech. Avoid words like "on" and "off" as standalone triggers — they're too common and might fire accidentally.
Step 4 — Set Up iPhone Shortcuts Automations
This is where NFC comes in. We'll create one automation per tag.
For the Lights ON tag (Door or Bedside):
- Open Shortcuts app → tap Automation tab → + → New Automation
- Scroll down → tap NFC
- Tap Scan → hold your iPhone's top edge close to the NFC tag
- Name the tag "Lights" → tap OK
- Tap Add Action → search "Hey Google" → select it
- In the Hey Google action, type:
Lights - Tap + below → search "Wait" → set to 3 seconds
- Tap + → search "Go to Home Screen" → add it
- At the top, set Automation to Run Immediately (not "Run After Confirmation")
- Toggle Notify When Run to ON (optional but useful — you get a lock screen confirmation)
- Tap Done
For the Lights OFF tag (Bedside):
Repeat the exact same steps above, but:
- When you scan the tag, name it "Nights"
- In the Hey Google action, type:
Nights
Step 5 — Stick the Tags
- Clean the surface with a dry cloth before sticking
- Press firmly for 5 seconds
- For high-traffic areas, consider an epoxy NFC tag instead of the sticker variant — more durable
The Result
Here's what happens now when I want to sleep:
- Phone is locked on my nightstand
- I pick it up — screen wakes (Face ID or tap)
- I tap the top edge of my phone to the small sticker on my headboard
- Lock screen shows: "Nights detected — Running your automation"
- Google Assistant quietly fires in the background
- Light turns off in ~2-3 seconds
- Phone returns to lock screen
No app. No voice command. No getting up. Just tap.
It genuinely feels like a superpower the first time it works.
Honest Limitations
I want to be upfront about what this setup doesn't do:
- iPhone must be unlocked (screen on) for NFC background reading to work — it doesn't fire from a completely dark, locked screen
- Internet required — the entire chain goes through cloud services (Wipro → Tuya → Google Home). No internet = no control
- ~2-3 second delay from tap to bulb response — not instant, but acceptable
- Physical switch is the weak point — if it's off, nothing works
- Google Assistant app must stay installed — if you delete it, the Hey Google Shortcut action breaks
What's Next — Ideas to Extend This
Now that you have 7 leftover NFC tags, here are ideas to use them:
NFC Business Card — Program a tag with your website URL. Hand someone a card, they tap their phone, your portfolio opens. Zero app install needed on their end.
Desk Work Mode Tag — Tap when sitting down: bulb switches to cool white 100% brightness automatically.
Bedtime Scene Tag — Instead of just OFF, trigger a scene: dim to 10% warm white for 10 minutes, then off. Great for winding down.
Phone Silent Mode — NFC tag on your desk at work that triggers a Shortcut to enable Do Not Disturb.
Spotify Playlist — Tag on your gym bag that opens a specific playlist when tapped.
Future upgrade: If you ever replace this bulb with a Matter-compatible smart bulb, it will work natively with Apple Home — no Google Assistant bridge needed. The NFC Shortcuts setup remains identical.
The Final Tally
| Item | Cost |
|---|---|
| Wipro Smart Bulb | ₹704 |
| 10x NFC Tags | ₹169 |
| Smart speaker | ₹0 (didn't need one) |
| Hub/Bridge | ₹0 (didn't need one) |
| Total | ₹873 |
| Setup time | ~90 minutes (including troubleshooting) |
| Satisfaction level | Disproportionately high |
Wrapping Up
This started as a lazy man's quest to avoid getting out of bed. It became a genuinely fun afternoon of exploring NFC technology, building a multi-layer automation chain, and learning why Wipro uses the Tuya platform under the hood.
The best part? It cost under ₹1000, uses zero extra hardware, and works every single time.
If you're on Android, the setup is even simpler — Tasker or the built-in Google routines can trigger directly without the Hey Google workaround.
What would you automate with your leftover NFC tags? Drop it in the comments — I'm genuinely curious what creative uses people come up with.
Found this useful? Follow me for more experiments where I build things I probably didn't need but definitely enjoyed making.
Products used:
Apps used (all free):
- Wipro Smart Home (iOS/Android)
- Google Home (iOS/Android)
- Google Assistant (iOS)
- Apple Shortcuts (built-in on iPhone)
Top comments (0)