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Communication speed: no higher than 500K / automatic adaptation, Flow control: automatic flow control, Operating current: Static 3mA, Item name: TTL to RS485 485 to Serial UART Level Converter Module, Brand name: Lantianrc, Working temperature: Recommended -30 °C -70 °C (limit range -40 °C -80 °C), Operating voltage: 5.0V, Load capacity: Maximum 128 devices, Size: 42*25mm
Aliexpress
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Banggood
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Link: Banggood product page
Price: $-3
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Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BG04a187, BGToys8, BGMatt2022, BG589b2e
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Price history and price alert
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Price records source(s): Banggood
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You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).