Room temperature monitor
An SMD board combining an ESP-01 and DS18B20 one wire temperature sensors to build a compact home room temperature monitor. I use these plugged into USB prots on wall sockets. To avoid picking up heat from the ESP-01 board, I solder 3 pin JST-SH leads to the DS18B20 sensor and solder a JST-SH socket onto the board.
The L1117 chip needs to be a 3.3V output version in a SOT223 package. The resistor is a 220ohm 1206 package SMD resistor.
Room temperature monitor
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