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| Both sides previous revisionPrevious revisionNext revision | Previous revision | ||
| projects:mees [2021/03/21 12:38] – trimen | projects:mees [2022/01/11 20:07] (current) – [Used parts:] trimen | ||
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| 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\\ | ||
| - | < | + | < |
| - | 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 |
| + | 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, | ||
| + | Add RF blocking inductor to VDDPA of ESP8285\\ | ||
| + | Add RGB LED for indication\\ | ||
| + | |||