{"product_id":"kit-soil-ph-field-tester-kit-v4","title":"Soil pH Field Tester Kit v4","description":"\u003ch1\u003eBuild a Voice-Activated Soil Analysis Tool with Raspberry Pi Zero 2W\u003c\/h1\u003e\n\n\u003cp class=\"value-summary\"\u003eEvery part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.\u003c\/p\u003e\n\n\u003cdiv class=\"specs-strip\"\u003e\n  \u003cspan\u003e\u003cstrong\u003eDifficulty:\u003c\/strong\u003e Intermediate\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eBuild Time:\u003c\/strong\u003e 3-4 hours\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eAge:\u003c\/strong\u003e 15-21\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eSkill:\u003c\/strong\u003e Voice-command automation and embedded Python\u003c\/span\u003e\n\u003c\/div\u003e\n\n\u003cp\u003eImagine standing in a field, soil samples in both hands, and simply saying “start pH test.” This kit turns that scenario into a working prototype. You’ll assemble a compact, battery-powered system where a Raspberry Pi Zero 2W runs Vosk offline speech recognition, listens to your commands through a USB microphone, and instantly triggers one of four relays—each ready to control a soil probe, pump, indicator light, or alarm.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Build\u003c\/h2\u003e\n\u003cp\u003eYou’ll create a voice-controlled relay hub that interprets spoken words without needing any internet connection. The moment you say a recognised command, the corresponding relay toggles. The box can sit beside you during soil sampling, letting you activate diagnostic routines, rinse probes, or log data—entirely hands-free. This is a real-world embedded system that bridges agriculture and modern IoT.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Learn\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eFlashing Raspberry Pi OS and configuring a headless setup for field deployment\u003c\/li\u003e\n  \u003cli\u003eIntegrating Vosk offline speech recognition with custom Python scripts\u003c\/li\u003e\n  \u003cli\u003eControlling 4-channel relay modules via GPIO pins safely\u003c\/li\u003e\n  \u003cli\u003eProcessing USB microphone audio and optimising recognition for outdoor environments\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eKit Contents\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eComponent\u003c\/th\u003e\n\u003cth\u003eQuantity\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRaspberry Pi Zero 2W\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e5V 4-Channel Relay\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eUSB Microphone\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMicroSD Card 16GB\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMicro USB Cable\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM-F Wires\u003c\/td\u003e\n\u003ctd\u003e15\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhy Buy This Kit Instead of Sourcing Parts Separately\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eFactor\u003c\/th\u003e\n\u003cth\u003eSourcing Separately\u003c\/th\u003e\n\u003cth\u003eCompoden Kit\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCompatibility checks\u003c\/td\u003e\n\u003ctd\u003eYou verify every part\u003c\/td\u003e\n\u003ctd\u003ePre-tested as a system\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBuild support\u003c\/td\u003e\n\u003ctd\u003eForums and scattered tutorials\u003c\/td\u003e\n\u003ctd\u003eAI companion trained on this exact project\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTime to first working build\u003c\/td\u003e\n\u003ctd\u003eDays of debugging\u003c\/td\u003e\n\u003ctd\u003eHours, with step-by-step guidance\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eShipping coordination\u003c\/td\u003e\n\u003ctd\u003eMultiple sellers, multiple delays\u003c\/td\u003e\n\u003ctd\u003eOne shipment from Bengaluru in 3-5 days\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWho This Kit Is For\u003c\/h2\u003e\n\u003cp\u003eThis kit is designed for intermediate learners exploring the intersection of agriculture and technology. It’s a strong fit for B.Tech ECE\/EEE students tackling mini projects, Smart India Hackathon teams prototyping IoT field devices, and CBSE Class 12 computer science students building practical voice applications. ATL Tinkering Labs and NIT\/VIT\/BITS clubs will find it instantly useful for demonstrating offline AI and relay automation.\u003c\/p\u003e\n\n\u003ch2\u003eBuilt and Backed by Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eDoes this kit include a soil pH sensor?\u003c\/summary\u003e\u003cp\u003eNo, it provides a voice-controlled relay output stage. You can connect your own pH electrode module, pump, or buzzer to any of the four relays, and the included scripts will toggle them on your spoken commands.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I change the trigger commands?\u003c\/summary\u003e\u003cp\u003eAbsolutely. The Vosk model listens for a small set of predefined phrases. You can edit the Python code to add new words like “measure pH,” “calibrate,” or “flush,” and retrain the recognizer if needed—the AI companion shows how.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDoes this run without Wi-Fi?\u003c\/summary\u003e\u003cp\u003eYes. After the initial OS and software setup (done once with your computer), the speech recognition runs entirely offline on the Pi. This makes it suitable for remote fields without internet.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat prior knowledge do I need?\u003c\/summary\u003e\u003cp\u003eBasic familiarity with Python and the terminal helps, but the AI companion walks you through every step from flashing the SD card to wiring relays. If you’ve ever built a simple Arduino circuit, you’ll feel comfortable.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003cdiv class=\"kit-description\"\u003e\n  \u003cp\u003eSoil Analysis — Raspberry Pi Zero 2W runs vosk offline speech recognition — recognised commands trigger relay outputs.\u003c\/p\u003e\n  \u003ch4\u003eWhat's in this kit\u003c\/h4\u003e\n  \u003cul\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/raspberry-pi-zero-2-w-quad-core-wifi-bluetooth-compoden\"\u003eRaspberry Pi Zero 2W\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/4-channel-relay-board-for-esp32-30-pin-5v-control\"\u003e5V 4-Channel Relay\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/esp32-cam-mb-programmer-module-with-micro-usb-ch340g-plug-play\"\u003eUSB Microphone\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/microsd-card-reader-spi-module-for-arduino\"\u003eMicroSD Card 16GB\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/microusb-cable-1m-charging-data-cord-for-arduino-android\"\u003eMicro USB Cable\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003eM-F Wires x15\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is included in the Soil pH Field Tester Kit v4?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The Soil pH Field Tester Kit v4 includes all components needed: Raspberry Pi Zero 2W, 5V 4-Channel Relay, USB Microphone, MicroSD Card 16GB, Micro USB Cable and more. Everything is pre-tested for compatibility and shipped from Bengaluru, India.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What skill level is required for the Soil pH Field Tester Kit v4?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"This kit is designed for Intermediate level makers, suitable for ages 15-21. Soil Analysis — Raspberry Pi Zero 2W runs vosk offline speech recognition — recognised commands trigger relay outputs. Estimated build time is 3-4 hrs.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I buy the Soil pH Field Tester Kit v4 online in India?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes, the Soil pH Field Tester Kit v4 is available online at Compoden (compoden.in), India's AI-powered electronics and robotics store. Ships from Bengaluru in 1-5 business days across India.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"Product\",\n  \"name\": \"Soil pH Field Tester Kit v4\",\n  \"description\": \"Soil Analysis — Raspberry Pi Zero 2W runs vosk offline speech recognition — recognised commands trigger relay outputs.\",\n  \"sku\": \"CDN-KIT-4350\",\n  \"brand\": {\"@type\": \"Brand\", \"name\": \"Compoden\"},\n  \"offers\": {\n    \"@type\": \"Offer\",\n    \"url\": \"https:\/\/compoden.in\/products\/kit-soil-ph-field-tester-kit-v4\",\n    \"priceCurrency\": \"INR\",\n    \"price\": \"5595\",\n    \"availability\": \"https:\/\/schema.org\/InStock\",\n    \"seller\": {\"@type\": \"Organization\", \"name\": \"Compoden\"}\n  },\n  \"category\": \"Lab Classroom Kits\"\n}\n\u003c\/script\u003e","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53463957078381,"sku":"CDN-KIT-4350","price":6600.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/kit-soil-ph-field-tester-kit-v4.png?v=1781949943","url":"https:\/\/compoden.com\/products\/kit-soil-ph-field-tester-kit-v4","provider":"Compoden","version":"1.0","type":"link"}