Wireless sensor possibilities

Today I’ve been thinking little bit about the wireless sensor possibilities. My friend at work knows about BLE (Bluetooth Low Energy) technology and he was going to order a NRF51822 BLE4.0 module for he’s projects. This module uses Nordic Semiconductor’s nRF51822 chip, which is designed for ulta-low-power wireless applications. Originally I was planning to use some WiFi module like CH340, but since BLE technology consumes less power, I think it makes more sense to use BLE in my project. I’m very lazy changing batteries, so if some engineer** from Nordic Semiconductor reads this, I hope you guys have done good job since I’m also going to use your nRF51822 chip!

(** I know quite many engineers in Nordic. They are ex-colleagues from other companies)

I found this article about the BLE – WiFi comparison for IoT: https://dzone.com/articles/ble-vs-wi-fi-for-iot-product-development

NRF51822 BLE4.0 module: https://www.aliexpress.com/item/32892343351.html?spm=a2g0o.productlist.0.0.55581a1apPw2Qy&algo_pvid=ba999031-9b11-41b7-a923-792cfa11467c&algo_expid=ba999031-9b11-41b7-a923-792cfa11467c-0&btsid=278ad177-5e37-469f-ad60-f4d94f43e1aa&ws_ab_test=searchweb0_0,searchweb201602_8,searchweb201603_53

CH340 WiFi module: https://www.aliexpress.com/item/32654418046.html?spm=a2g0o.detail.100009.1.698d6b18MXHfr9&gps-id=pcDetailLeftTopSell&scm=1007.13482.95643.0&scm_id=1007.13482.95643.0&scm-url=1007.13482.95643.0&pvid=78f3a7fd-dddf-43d9-a2b9-0b215d537348

There is also commercial moisture sensor available by Xiaomi, but it cost’s more than DIY-version (Do It Yourself by connecting moisture sensor and BLE module): https://www.ebay.com/itm/Xiaomi-Plant-Tester-Light-Temperature-Soil-Moisture-Meter-Nutrition-Detector-/283447735022

That’s all about the technology for this time. Tomorrow I’ll buy chili seeds and start first plantings for this year!

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