diff --git a/README.md b/README.md
index 9cc0e5f..badba04 100644
--- a/README.md
+++ b/README.md
@@ -13,3 +13,32 @@ if there is no sensor on the GPIO in). They are placed on timers so as to
 minimize pre-emption of the main application. DHT sensors are polled in order
 based on `sensors.dht_gpio` pins and with a period of `sensors.dht_period`
 which defaults to 3 seconds.
+
+Please see the upstream [source](https://github.com/mongoose-os-libs/dht)
+for more information on the driver.
+
+Reported values (all types are gauges):
+```
+temperature{sensor="0",type="DHT"} 3.5
+temperature{sensor="1",type="DHT"} 6.2
+humidity{sensor="0",type="DHT"} 43.900002
+humidity{sensor="1",type="DHT"} 35.599998
+```
+
+### VEML6075
+
+This is using `veml6075-i2c` library; one sensor is allowed based on I2C
+address on the bus, normally `0x10`, but configurable with `sensors.veml6075_i2caddr`
+in `mos.yml`.  The chip is polled with a period of `sensors.veml6075_period`
+which defaults to 3 seconds, each sensor reading takes approximately 11ms.
+
+Please see the upstream [source](https://github.com/mongoose-os-libs/veml6075-i2c)
+for more information on the driver.
+
+Reported values (all types are gauges):
+```
+UV{band="UVA",sensor="0",type="VEML6075"} 0
+UV{band="UVB",sensor="0",type="VEML6075"} 2
+UVIndex{sensor="0",type="VEML6075"} 0.00125
+```
+