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projects:mees [2021/03/21 12:38]
projects:mees [2022/01/11 20:07] (current)
trimen [Used parts:]
Line 14: Line 14:
 CSS811 - TVOC and eCO2 sensor\\ CSS811 - TVOC and eCO2 sensor\\
 SI7021 - relative humidity and temperature sensor\\ SI7021 - relative humidity and temperature sensor\\
-<del>MR44V100AMAZAATL - I2C FRAM for data logging\\</del> +<del>MR44V100AMAZAATL - I2C FRAM for data logging</del> \\ 
-M24M01-RMN6P - I2C EEPROM for calibration data storage\\+ M24M01-RMN6P - I2C EEPROM for calibration data storage\\
 ESP8285 - main CPU with WiFi\\ ESP8285 - main CPU with WiFi\\
Line 27: Line 27:
 ===TODO for REV. B=== ===TODO for REV. B===
 Add pull-up resistor to GPIO2\\ Add pull-up resistor to GPIO2\\
-Add clearance on sides of antenna\\ +Add clearance on sides of antenna/use chip antenna\\ 
-Find another USB to UART converter, because Silicon Labs chips are unavailable\\+Find another <del>USB to UART converter</del> chips, because <del>Silicon Labs</del> chips are unavailable\\ 
 +Find another temperature and humidity sensor\\ 
 +Enlarge board & add better thermal isolation between CPU, gas sensors, and temperature sensor\\ 
 + -> maybe a mezzanine board?\\ 
 +--> currently this isn't an issue when the fan is unregulated\\ 
 +Add mounting holes\\ 
 +Add 4R7+1uF RC element to VDD of SGP40 and CCS811 sensor\\ 
 +Add UART on board for particle sensors (HPMA115C0-XXX, SPS30...)\\ 
 +Add RF blocking inductor to VDDPA of ESP8285\\ 
 +Add RGB LED for indication\\